Vulnerability-Lookup

alsa-2025:16428

Vulnerability from osv_almalinux

Published

2025-09-23 00:00

Modified

2025-09-29 08:40

Summary

Moderate: libtpms security update

Details

The libtpms is a library providing Trusted Platform Module (TPM) functionality for virtual machines.

Security Fix(es):

libtpms: Libtpms Out-of-Bounds Read Vulnerability (CVE-2025-49133)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "libtpms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.9.6-11.el10_0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "The libtpms is a library providing Trusted Platform Module (TPM) functionality for virtual machines.  \n\nSecurity Fix(es):  \n\n  * libtpms: Libtpms Out-of-Bounds Read Vulnerability (CVE-2025-49133)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
  "id": "ALSA-2025:16428",
  "modified": "2025-09-29T08:40:24Z",
  "published": "2025-09-23T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2025:16428"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-49133"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2371585"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/10/ALSA-2025-16428.html"
    }
  ],
  "related": [
    "CVE-2025-49133"
  ],
  "summary": "Moderate: libtpms security update"
}

CVE-2025-49133 (GCVE-0-2025-49133)

Vulnerability from cvelistv5 – Published: 2025-06-10 19:46 – Updated: 2025-11-03 20:05

Title

Libtpms contains a possible out-of-bound access and abort due to HMAC signing issue

Summary

Libtpms is a library that targets the integration of TPM functionality into hypervisors, primarily into Qemu. Libtpms, which is derived from the TPM 2.0 reference implementation code published by the Trusted Computing Group, is prone to a potential out of bounds (OOB) read vulnerability. The vulnerability occurs in the ‘CryptHmacSign’ function with an inconsistent pairing of the signKey and signScheme parameters, where the signKey is ALG_KEYEDHASH key and inScheme is an ECC or RSA scheme. The reported vulnerability is in the ‘CryptHmacSign’ function, which is defined in the "Part 4: Supporting Routines – Code" document, section "7.151 - /tpm/src/crypt/CryptUtil.c ". This vulnerability can be triggered from user-mode applications by sending malicious commands to a TPM 2.0/vTPM (swtpm) whose firmware is based on an affected TCG reference implementation. The effect on libtpms is that it will cause an abort due to the detection of the out-of-bounds access, thus for example making a vTPM (swtpm) unavailable to a VM. This vulnerability is fixed in 0.7.12, 0.8.10, 0.9.7, and 0.10.1.

Severity ?

5.9 (Medium)


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

CWE

CWE-125 - Out-of-bounds Read

Assigner

GitHub_M

References

URL

Tags

	https://github.com/stefanberger/libtpms/security/…	x_refsource_CONFIRM
	https://github.com/stefanberger/libtpms/commit/04…	x_refsource_MISC
	https://trustedcomputinggroup.org/resource/tpm-li…	x_refsource_MISC
	https://trustedcomputinggroup.org/wp-content/uplo…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	stefanberger	libtpms	Affected: = 0.7.11 Affected: = 0.8.9 Affected: = 0.9.6 Affected: = 0.10.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-49133",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-06-10T20:00:47.887183Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-06-10T20:01:40.310Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T20:05:08.172Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://www.kb.cert.org/vuls/id/282450"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "libtpms",
          "vendor": "stefanberger",
          "versions": [
            {
              "status": "affected",
              "version": "= 0.7.11"
            },
            {
              "status": "affected",
              "version": "= 0.8.9"
            },
            {
              "status": "affected",
              "version": "= 0.9.6"
            },
            {
              "status": "affected",
              "version": "= 0.10.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Libtpms is a library that targets the integration of TPM functionality into hypervisors, primarily into Qemu. Libtpms, which is derived from the TPM 2.0 reference implementation code published by the Trusted Computing Group, is prone to a potential out of bounds (OOB) read vulnerability. The vulnerability occurs in the \u2018CryptHmacSign\u2019 function with an inconsistent pairing of the signKey and signScheme parameters, where the signKey is ALG_KEYEDHASH key and inScheme is an ECC or RSA scheme. The reported vulnerability is in the \u2018CryptHmacSign\u2019 function, which is defined in the \"Part 4: Supporting Routines \u2013 Code\" document, section \"7.151 - /tpm/src/crypt/CryptUtil.c \". This vulnerability can be triggered from user-mode applications by sending malicious commands to a TPM 2.0/vTPM (swtpm) whose firmware is based on an affected TCG reference implementation. The effect on libtpms is that it will cause an abort due to the detection of the out-of-bounds access, thus for example making a vTPM (swtpm) unavailable to a VM. This vulnerability is fixed in 0.7.12, 0.8.10, 0.9.7, and 0.10.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "CWE-125: Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-06-10T19:46:27.397Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/stefanberger/libtpms/security/advisories/GHSA-25w5-6fjj-hf8g",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/stefanberger/libtpms/security/advisories/GHSA-25w5-6fjj-hf8g"
        },
        {
          "name": "https://github.com/stefanberger/libtpms/commit/04b2d8e9afc0a9b6bffe562a23e58c0de11532d1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/stefanberger/libtpms/commit/04b2d8e9afc0a9b6bffe562a23e58c0de11532d1"
        },
        {
          "name": "https://trustedcomputinggroup.org/resource/tpm-library-specification",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://trustedcomputinggroup.org/resource/tpm-library-specification"
        },
        {
          "name": "https://trustedcomputinggroup.org/wp-content/uploads/TPM-2.0-1.83-Part-4-Supporting-Routines-Code.pdf",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://trustedcomputinggroup.org/wp-content/uploads/TPM-2.0-1.83-Part-4-Supporting-Routines-Code.pdf"
        }
      ],
      "source": {
        "advisory": "GHSA-25w5-6fjj-hf8g",
        "discovery": "UNKNOWN"
      },
      "title": "Libtpms contains a possible out-of-bound access and abort due to HMAC signing issue"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-49133",
    "datePublished": "2025-06-10T19:46:27.397Z",
    "dateReserved": "2025-06-02T10:39:41.633Z",
    "dateUpdated": "2025-11-03T20:05:08.172Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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