CVE-2023-42115 (GCVE-0-2023-42115)

Vulnerability from cvelistv5 – Published: 2024-05-03 02:13 – Updated: 2024-09-20 19:51
VLAI?
Title
Exim AUTH Out-Of-Bounds Write Remote Code Execution Vulnerability
Summary
Exim AUTH Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the smtp service, which listens on TCP port 25 by default. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of a buffer. An attacker can leverage this vulnerability to execute code in the context of the service account. . Was ZDI-CAN-17434.
Severity ?
9.8 (Critical)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
Assigner
zdi
References
Impacted products
Vendor Product Version
Exim Exim Affected: exim 4.95
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "exim",
            "vendor": "exim",
            "versions": [
              {
                "lessThan": "4.95",
                "status": "affected",
                "version": "0",
                "versionType": "custom"
              }
            ]
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2023-42115",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-20T19:32:20.272668Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-20T19:51:52.263Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T19:16:50.537Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "ZDI-23-1469",
            "tags": [
              "x_research-advisory",
              "x_transferred"
            ],
            "url": "https://www.zerodayinitiative.com/advisories/ZDI-23-1469/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "Exim",
          "vendor": "Exim",
          "versions": [
            {
              "status": "affected",
              "version": "exim 4.95"
            }
          ]
        }
      ],
      "dateAssigned": "2023-09-06T16:25:45.458-05:00",
      "datePublic": "2023-09-27T17:21:04.217-05:00",
      "descriptions": [
        {
          "lang": "en",
          "value": "Exim AUTH Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Exim. Authentication is not required to exploit this vulnerability. \n\nThe specific flaw exists within the smtp service, which listens on TCP port 25 by default. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of a buffer. An attacker can leverage this vulnerability to execute code in the context of the service account.\n. Was ZDI-CAN-17434."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.0"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-787",
              "description": "CWE-787: Out-of-bounds Write",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-09-18T18:30:10.109Z",
        "orgId": "99f1926a-a320-47d8-bbb5-42feb611262e",
        "shortName": "zdi"
      },
      "references": [
        {
          "name": "ZDI-23-1469",
          "tags": [
            "x_research-advisory"
          ],
          "url": "https://www.zerodayinitiative.com/advisories/ZDI-23-1469/"
        }
      ],
      "source": {
        "lang": "en",
        "value": "Anonymous"
      },
      "title": "Exim AUTH Out-Of-Bounds Write Remote Code Execution Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "99f1926a-a320-47d8-bbb5-42feb611262e",
    "assignerShortName": "zdi",
    "cveId": "CVE-2023-42115",
    "datePublished": "2024-05-03T02:13:23.745Z",
    "dateReserved": "2023-09-06T21:14:24.435Z",
    "dateUpdated": "2024-09-20T19:51:52.263Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://www.zerodayinitiative.com/advisories/ZDI-23-1469/\", \"name\": \"ZDI-23-1469\", \"tags\": [\"x_research-advisory\", \"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T19:16:50.537Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-42115\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-20T19:32:20.272668Z\"}}}], \"affected\": [{\"cpes\": [\"cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*\"], \"vendor\": \"exim\", \"product\": \"exim\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"4.95\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-06-06T18:08:50.835Z\"}}], \"cna\": {\"title\": \"Exim AUTH Out-Of-Bounds Write Remote Code Execution Vulnerability\", \"source\": {\"lang\": \"en\", \"value\": \"Anonymous\"}, \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_0\": {\"version\": \"3.0\", \"baseScore\": 9.8, \"baseSeverity\": \"CRITICAL\", \"vectorString\": \"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\"}}], \"affected\": [{\"vendor\": \"Exim\", \"product\": \"Exim\", \"versions\": [{\"status\": \"affected\", \"version\": \"exim 4.95\"}], \"defaultStatus\": \"unknown\"}], \"datePublic\": \"2023-09-27T17:21:04.217-05:00\", \"references\": [{\"url\": \"https://www.zerodayinitiative.com/advisories/ZDI-23-1469/\", \"name\": \"ZDI-23-1469\", \"tags\": [\"x_research-advisory\"]}], \"dateAssigned\": \"2023-09-06T16:25:45.458-05:00\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"Exim AUTH Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Exim. Authentication is not required to exploit this vulnerability. \\n\\nThe specific flaw exists within the smtp service, which listens on TCP port 25 by default. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of a buffer. An attacker can leverage this vulnerability to execute code in the context of the service account.\\n. Was ZDI-CAN-17434.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-787\", \"description\": \"CWE-787: Out-of-bounds Write\"}]}], \"providerMetadata\": {\"orgId\": \"99f1926a-a320-47d8-bbb5-42feb611262e\", \"shortName\": \"zdi\", \"dateUpdated\": \"2024-09-18T18:30:10.109Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-42115\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-09-20T19:51:52.263Z\", \"dateReserved\": \"2023-09-06T21:14:24.435Z\", \"assignerOrgId\": \"99f1926a-a320-47d8-bbb5-42feb611262e\", \"datePublished\": \"2024-05-03T02:13:23.745Z\", \"assignerShortName\": \"zdi\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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.