ubuntu-cve-2022-37451
Vulnerability from osv_ubuntu
Published
2022-08-06 18:15
Modified
2025-07-16 05:01
Summary
Details

Exim before 4.96 has an invalid free in pam_converse in auths/call_pam.c because store_free is not used after store_malloc.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "exim4",
            "binary_version": "4.95-4ubuntu2.1"
          },
          {
            "binary_name": "exim4-base",
            "binary_version": "4.95-4ubuntu2.1"
          },
          {
            "binary_name": "exim4-base-dbgsym",
            "binary_version": "4.95-4ubuntu2.1"
          },
          {
            "binary_name": "exim4-config",
            "binary_version": "4.95-4ubuntu2.1"
          },
          {
            "binary_name": "exim4-daemon-heavy",
            "binary_version": "4.95-4ubuntu2.1"
          },
          {
            "binary_name": "exim4-daemon-heavy-dbgsym",
            "binary_version": "4.95-4ubuntu2.1"
          },
          {
            "binary_name": "exim4-daemon-light",
            "binary_version": "4.95-4ubuntu2.1"
          },
          {
            "binary_name": "exim4-daemon-light-dbgsym",
            "binary_version": "4.95-4ubuntu2.1"
          },
          {
            "binary_name": "exim4-dev",
            "binary_version": "4.95-4ubuntu2.1"
          },
          {
            "binary_name": "eximon4",
            "binary_version": "4.95-4ubuntu2.1"
          },
          {
            "binary_name": "eximon4-dbgsym",
            "binary_version": "4.95-4ubuntu2.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "exim4",
        "purl": "pkg:deb/ubuntu/exim4@4.95-4ubuntu2.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.95-4ubuntu2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.94.2-7ubuntu2",
        "4.95-2ubuntu2",
        "4.95-4ubuntu1",
        "4.95-4ubuntu2"
      ]
    }
  ],
  "aliases": [],
  "details": "Exim before 4.96 has an invalid free in pam_converse in auths/call_pam.c because store_free is not used after store_malloc.",
  "id": "UBUNTU-CVE-2022-37451",
  "modified": "2025-07-16T05:01:34Z",
  "published": "2022-08-06T18:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2022-37451"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/ivd38/exim_invalid_free"
    },
    {
      "type": "REPORT",
      "url": "https://lists.exim.org/lurker/message/20220625.141825.d6de6074.en.html"
    },
    {
      "type": "REPORT",
      "url": "https://www.openwall.com/lists/oss-security/2022/08/06/1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2022-37451"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2022-37451"
  ],
  "withdrawn": "2025-07-18T16:49:31Z"
}



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