Vulnerability-Lookup

CVE-2024-40640 (GCVE-0-2024-40640)

Vulnerability from cvelistv5 – Published: 2024-07-17 17:27 – Updated: 2024-08-02 04:33

Title

Usage of non-constant time base64 decoder could lead to leakage of secret key material in vodozemac

Summary

vodozemac is an open source implementation of Olm and Megolm in pure Rust. Versions before 0.7.0 of vodozemac use a non-constant time base64 implementation for importing key material for Megolm group sessions and `PkDecryption` Ed25519 secret keys. This flaw might allow an attacker to infer some information about the secret key material through a side-channel attack. The use of a non-constant time base64 implementation might allow an attacker to observe timing variations in the encoding and decoding operations of the secret key material. This could potentially provide insights into the underlying secret key material. The impact of this vulnerability is considered low because exploiting the attacker is required to have access to high precision timing measurements, as well as repeated access to the base64 encoding or decoding processes. Additionally, the estimated leakage amount is bounded and low according to the referenced paper. This has been patched in commit 734b6c6948d4b2bdee3dd8b4efa591d93a61d272 which has been included in release version 0.7.0. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Severity ?

2.9 (Low)


                        
                          CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

CWE

CWE-208 - Observable Timing Discrepancy

Assigner

GitHub_M

References

URL

Tags

	https://github.com/matrix-org/vodozemac/security/…	x_refsource_CONFIRM
	https://github.com/matrix-org/vodozemac/commit/73…	x_refsource_MISC
	https://arxiv.org/abs/2108.04600	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	matrix-org	vodozemac	Affected: < 0.7.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-40640",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-07-17T18:15:24.360907Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-07-17T18:15:31.774Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T04:33:11.880Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "https://github.com/matrix-org/vodozemac/security/advisories/GHSA-j8cm-g7r6-hfpq",
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/matrix-org/vodozemac/security/advisories/GHSA-j8cm-g7r6-hfpq"
          },
          {
            "name": "https://github.com/matrix-org/vodozemac/commit/734b6c6948d4b2bdee3dd8b4efa591d93a61d272",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/matrix-org/vodozemac/commit/734b6c6948d4b2bdee3dd8b4efa591d93a61d272"
          },
          {
            "name": "https://arxiv.org/abs/2108.04600",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://arxiv.org/abs/2108.04600"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "vodozemac",
          "vendor": "matrix-org",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.7.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "vodozemac is an open source implementation of Olm and Megolm in pure Rust.  Versions before 0.7.0 of vodozemac use a non-constant time base64 implementation for importing key material for Megolm group sessions and `PkDecryption` Ed25519 secret keys. This flaw might allow an attacker to infer some information about the secret key material through a side-channel attack. The use of a non-constant time base64 implementation might allow an attacker to observe timing variations in the encoding and decoding operations of the secret key material. This could potentially provide insights into the underlying secret key material. The impact of this vulnerability is considered low because exploiting the attacker is required to have access to high precision timing measurements, as well as repeated access to the base64 encoding or decoding processes.  Additionally, the estimated leakage amount is bounded and low according to the referenced paper. This has been patched in commit 734b6c6948d4b2bdee3dd8b4efa591d93a61d272 which has been included in release version 0.7.0. Users are advised to upgrade. There are no known workarounds for this vulnerability.\n"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 2.9,
            "baseSeverity": "LOW",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-208",
              "description": "CWE-208: Observable Timing Discrepancy",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-07-17T17:27:15.586Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/matrix-org/vodozemac/security/advisories/GHSA-j8cm-g7r6-hfpq",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/matrix-org/vodozemac/security/advisories/GHSA-j8cm-g7r6-hfpq"
        },
        {
          "name": "https://github.com/matrix-org/vodozemac/commit/734b6c6948d4b2bdee3dd8b4efa591d93a61d272",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/matrix-org/vodozemac/commit/734b6c6948d4b2bdee3dd8b4efa591d93a61d272"
        },
        {
          "name": "https://arxiv.org/abs/2108.04600",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://arxiv.org/abs/2108.04600"
        }
      ],
      "source": {
        "advisory": "GHSA-j8cm-g7r6-hfpq",
        "discovery": "UNKNOWN"
      },
      "title": "Usage of non-constant time base64 decoder could lead to leakage of secret key material in vodozemac"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2024-40640",
    "datePublished": "2024-07-17T17:27:15.586Z",
    "dateReserved": "2024-07-08T16:13:15.512Z",
    "dateUpdated": "2024-08-02T04:33:11.880Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-40640\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-07-17T18:15:24.360907Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-07-17T18:15:28.306Z\"}}], \"cna\": {\"title\": \"Usage of non-constant time base64 decoder could lead to leakage of secret key material in vodozemac\", \"source\": {\"advisory\": \"GHSA-j8cm-g7r6-hfpq\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 2.9, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"LOW\", \"vectorString\": \"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"LOW\"}}], \"affected\": [{\"vendor\": \"matrix-org\", \"product\": \"vodozemac\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 0.7.0\"}]}], \"references\": [{\"url\": \"https://github.com/matrix-org/vodozemac/security/advisories/GHSA-j8cm-g7r6-hfpq\", \"name\": \"https://github.com/matrix-org/vodozemac/security/advisories/GHSA-j8cm-g7r6-hfpq\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/matrix-org/vodozemac/commit/734b6c6948d4b2bdee3dd8b4efa591d93a61d272\", \"name\": \"https://github.com/matrix-org/vodozemac/commit/734b6c6948d4b2bdee3dd8b4efa591d93a61d272\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://arxiv.org/abs/2108.04600\", \"name\": \"https://arxiv.org/abs/2108.04600\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"vodozemac is an open source implementation of Olm and Megolm in pure Rust.  Versions before 0.7.0 of vodozemac use a non-constant time base64 implementation for importing key material for Megolm group sessions and `PkDecryption` Ed25519 secret keys. This flaw might allow an attacker to infer some information about the secret key material through a side-channel attack. The use of a non-constant time base64 implementation might allow an attacker to observe timing variations in the encoding and decoding operations of the secret key material. This could potentially provide insights into the underlying secret key material. The impact of this vulnerability is considered low because exploiting the attacker is required to have access to high precision timing measurements, as well as repeated access to the base64 encoding or decoding processes.  Additionally, the estimated leakage amount is bounded and low according to the referenced paper. This has been patched in commit 734b6c6948d4b2bdee3dd8b4efa591d93a61d272 which has been included in release version 0.7.0. Users are advised to upgrade. There are no known workarounds for this vulnerability.\\n\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-208\", \"description\": \"CWE-208: Observable Timing Discrepancy\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2024-07-17T17:27:15.586Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-40640\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-07-17T18:15:31.774Z\", \"dateReserved\": \"2024-07-08T16:13:15.512Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2024-07-17T17:27:15.586Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}

GHSA-J8CM-G7R6-HFPQ

Vulnerability from github – Published: 2024-07-17 18:30 – Updated: 2024-11-18 16:26

Summary

vodozemac's usage of non-constant time base64 decoder could lead to leakage of secret key material

Details

Versions before 0.7.0 of vodozemac use a non-constant time base64 implementation for importing key material for Megolm group sessions and PkDecryption Ed25519 secret keys. This flaw might allow an attacker to infer some information about the secret key material through a side-channel attack.

Impact

The use of a non-constant time base64 implementation might allow an attacker to observe timing variations in the encoding and decoding operations of the secret key material. This could potentially provide insights into the underlying secret key material.

The impact of this vulnerability is considered low because exploiting the attacker is required to have access to high precision timing measurements, as well as repeated access to the base64 encoding or decoding processes. Additionally, the estimated leakage amount is bounded and low according to the referenced paper.

Patches

The patch is in commit 734b6c6948d4b2bdee3dd8b4efa591d93a61d272.

Workarounds

None.

References

A detailed description of the precise attack can be found at https://arxiv.org/abs/2108.04600. We kindly thank Soatok for pointing out this research to us.

For more information

If you have any questions or comments about this advisory please email us at security at matrix.org.

Severity ?

3.7 (Low)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

6.3 (Medium)


                  
                    CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "vodozemac"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.7.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-40640"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-208"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-07-17T18:30:55Z",
    "nvd_published_at": "2024-07-17T18:15:04Z",
    "severity": "MODERATE"
  },
  "details": "Versions before 0.7.0 of vodozemac use a non-constant time base64 implementation for importing key material for Megolm group sessions and `PkDecryption` Ed25519 secret keys. This flaw might allow an attacker to infer some information about the secret key material through a side-channel attack.\n\n### Impact\n\nThe use of a non-constant time base64 implementation might allow an attacker to observe timing variations in the encoding and decoding operations of the secret key material. This could potentially provide insights into the underlying secret key material.\n\nThe impact of this vulnerability is considered low because exploiting the attacker is required to have access to high precision timing measurements, as well as repeated access to the base64 encoding or decoding processes.  Additionally, the estimated leakage amount is bounded and low according to the referenced paper.\n\n### Patches\n\nThe patch is in commit 734b6c6948d4b2bdee3dd8b4efa591d93a61d272.\n\n### Workarounds\nNone.\n\n### References\nA detailed description of the precise attack can be found at https://arxiv.org/abs/2108.04600. We kindly thank Soatok for pointing out this research to us.\n\n### For more information\nIf you have any questions or comments about this advisory please email us at [security at matrix.org](mailto:security@matrix.org).\n",
  "id": "GHSA-j8cm-g7r6-hfpq",
  "modified": "2024-11-18T16:26:53Z",
  "published": "2024-07-17T18:30:55Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/vodozemac/security/advisories/GHSA-j8cm-g7r6-hfpq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-40640"
    },
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/vodozemac/commit/734b6c6948d4b2bdee3dd8b4efa591d93a61d272"
    },
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/vodozemac/commit/77765dace11266ef9523301624a01265c6e0f790"
    },
    {
      "type": "WEB",
      "url": "https://arxiv.org/abs/2108.04600"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/matrix-org/vodozemac"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2024-0354.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "vodozemac\u0027s usage of non-constant time base64 decoder could lead to leakage of secret key material"
}

FKIE_CVE-2024-40640

Vulnerability from fkie_nvd - Published: 2024-07-17 18:15 - Updated: 2024-11-21 09:31

Severity ?

2.9 (Low) - CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://arxiv.org/abs/2108.04600
	security-advisories@github.com	https://github.com/matrix-org/vodozemac/commit/734b6c6948d4b2bdee3dd8b4efa591d93a61d272
	security-advisories@github.com	https://github.com/matrix-org/vodozemac/security/advisories/GHSA-j8cm-g7r6-hfpq
	af854a3a-2127-422b-91ae-364da2661108	https://arxiv.org/abs/2108.04600
	af854a3a-2127-422b-91ae-364da2661108	https://github.com/matrix-org/vodozemac/commit/734b6c6948d4b2bdee3dd8b4efa591d93a61d272
	af854a3a-2127-422b-91ae-364da2661108	https://github.com/matrix-org/vodozemac/security/advisories/GHSA-j8cm-g7r6-hfpq

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "vodozemac is an open source implementation of Olm and Megolm in pure Rust.  Versions before 0.7.0 of vodozemac use a non-constant time base64 implementation for importing key material for Megolm group sessions and `PkDecryption` Ed25519 secret keys. This flaw might allow an attacker to infer some information about the secret key material through a side-channel attack. The use of a non-constant time base64 implementation might allow an attacker to observe timing variations in the encoding and decoding operations of the secret key material. This could potentially provide insights into the underlying secret key material. The impact of this vulnerability is considered low because exploiting the attacker is required to have access to high precision timing measurements, as well as repeated access to the base64 encoding or decoding processes.  Additionally, the estimated leakage amount is bounded and low according to the referenced paper. This has been patched in commit 734b6c6948d4b2bdee3dd8b4efa591d93a61d272 which has been included in release version 0.7.0. Users are advised to upgrade. There are no known workarounds for this vulnerability.\n"
    },
    {
      "lang": "es",
      "value": "vodozemac es una implementaci\u00f3n de c\u00f3digo abierto de Olm y Megolm en Rust puro. Las versiones anteriores a la 0.7.0 de vodozemac utilizan una implementaci\u00f3n base64 de tiempo no constante para importar material clave para sesiones de grupo Megolm y claves secretas `PkDecryption` Ed25519. Esta falla podr\u00eda permitir a un atacante inferir cierta informaci\u00f3n sobre el material de la clave secreta a trav\u00e9s de un ataque de canal lateral. El uso de una implementaci\u00f3n de base64 de tiempo no constante podr\u00eda permitir a un atacante observar variaciones de tiempo en las operaciones de codificaci\u00f3n y decodificaci\u00f3n del material de clave secreta. Potencialmente, esto podr\u00eda proporcionar informaci\u00f3n sobre el material de la clave secreta subyacente. El impacto de esta vulnerabilidad se considera bajo porque para explotar al atacante se requiere tener acceso a mediciones de tiempo de alta precisi\u00f3n, as\u00ed como acceso repetido a los procesos de codificaci\u00f3n o decodificaci\u00f3n base64. Adem\u00e1s, la cantidad estimada de fuga es limitada y baja seg\u00fan el documento de referencia. Esto se ha parcheado en el commit 734b6c6948d4b2bdee3dd8b4efa591d93a61d272 que se ha incluido en la versi\u00f3n 0.7.0. Se recomienda a los usuarios que actualicen. No se conocen workarounds para esta vulnerabilidad."
    }
  ],
  "id": "CVE-2024-40640",
  "lastModified": "2024-11-21T09:31:24.770",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 2.9,
          "baseSeverity": "LOW",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.4,
        "impactScore": 1.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2024-07-17T18:15:04.787",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://arxiv.org/abs/2108.04600"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/matrix-org/vodozemac/commit/734b6c6948d4b2bdee3dd8b4efa591d93a61d272"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/matrix-org/vodozemac/security/advisories/GHSA-j8cm-g7r6-hfpq"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://arxiv.org/abs/2108.04600"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://github.com/matrix-org/vodozemac/commit/734b6c6948d4b2bdee3dd8b4efa591d93a61d272"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://github.com/matrix-org/vodozemac/security/advisories/GHSA-j8cm-g7r6-hfpq"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-208"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

cve-2024-40640

Vulnerability from osv_rustsec

Published

2024-07-17 12:00

Modified

2024-07-18 11:24

Summary

Usage of non-constant time base64 decoder could lead to leakage of secret key material

Details

Impact

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "crypto-failure",
          "memory-exposure"
        ],
        "cvss": null,
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "vodozemac",
        "purl": "pkg:cargo/vodozemac"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "0.7.0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "CVE-2024-40640",
    "GHSA-j8cm-g7r6-hfpq"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "Versions before 0.7.0 of vodozemac use a non-constant time base64 implementation\nfor importing key material for Megolm group sessions and `PkDecryption` Ed25519\nsecret keys. This flaw might allow an attacker to infer some information about\nthe secret key material through a side-channel attack.\n\n## Impact\n\nThe use of a non-constant time base64 implementation might allow an attacker to\nobserve timing variations in the encoding and decoding operations of the secret\nkey material. This could potentially provide insights into the underlying secret\nkey material.\n\nThe impact of this vulnerability is considered low because exploiting the\nattacker is required to have access to high precision timing measurements, as\nwell as repeated access to the base64 encoding or decoding processes.\nAdditionally, the estimated leakage amount is bounded and low according to the\nreferenced paper[[1]].\n\n[1]: https://arxiv.org/abs/2108.04600",
  "id": "RUSTSEC-2024-0354",
  "modified": "2024-07-18T11:24:58Z",
  "published": "2024-07-17T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/vodozemac"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2024-0354.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/matrix-org/vodozemac/security/advisories/GHSA-j8cm-g7r6-hfpq"
    }
  ],
  "related": [],
  "severity": [],
  "summary": " Usage of non-constant time base64 decoder could lead to leakage of secret key material"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2024-40640 (GCVE-0-2024-40640)

GHSA-J8CM-G7R6-HFPQ

Impact

Patches

Workarounds

References

For more information

FKIE_CVE-2024-40640

cve-2024-40640

Vulnerability from osv_rustsec

Impact

Tags

Sightings

Nomenclature