USN-6455-2

Vulnerability from osv_ubuntu – Published: 2026-06-10 12:22 – Updated: 2026-06-10 12:22 – Source website
VLAI
Summary
exim4 regression
Details

USN-6455-1 fixed vulnerabilities in Exim. The fix for CVE-2023-42117 introduced a regression on Ubuntu 22.04 LTS that resulted in certain connections logging a Taint mismatch error. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

It was discovered that Exim incorrectly handled validation of user-supplied data, which could lead to memory corruption. A remote attacker could possibly use this issue to execute arbitrary code. (CVE-2023-42117)

It was discovered that Exim incorrectly handled validation of user-supplied data, which could lead to an out-of-bounds read. An attacker could possibly use this issue to expose sensitive information. (CVE-2023-42119)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "exim4",
            "binary_version": "4.95-4ubuntu2.10"
          },
          {
            "binary_name": "exim4-base",
            "binary_version": "4.95-4ubuntu2.10"
          },
          {
            "binary_name": "exim4-config",
            "binary_version": "4.95-4ubuntu2.10"
          },
          {
            "binary_name": "exim4-daemon-heavy",
            "binary_version": "4.95-4ubuntu2.10"
          },
          {
            "binary_name": "exim4-daemon-light",
            "binary_version": "4.95-4ubuntu2.10"
          },
          {
            "binary_name": "eximon4",
            "binary_version": "4.95-4ubuntu2.10"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "exim4",
        "purl": "pkg:deb/ubuntu/exim4@4.95-4ubuntu2.10?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.95-4ubuntu2.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.94.2-7ubuntu2",
        "4.95-2ubuntu2",
        "4.95-4ubuntu1",
        "4.95-4ubuntu2",
        "4.95-4ubuntu2.1",
        "4.95-4ubuntu2.2",
        "4.95-4ubuntu2.3",
        "4.95-4ubuntu2.4",
        "4.95-4ubuntu2.5",
        "4.95-4ubuntu2.6",
        "4.95-4ubuntu2.7",
        "4.95-4ubuntu2.8",
        "4.95-4ubuntu2.9"
      ]
    }
  ],
  "aliases": [],
  "details": "USN-6455-1 fixed vulnerabilities in Exim. The fix for CVE-2023-42117\nintroduced a regression on Ubuntu 22.04 LTS that resulted in certain\nconnections logging a Taint mismatch error. This update fixes the problem.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that Exim incorrectly handled validation of user-supplied\n data, which could lead to memory corruption. A remote attacker could\n possibly use this issue to execute arbitrary code. (CVE-2023-42117)\n\n It was discovered that Exim incorrectly handled validation of user-supplied\n data, which could lead to an out-of-bounds read. An attacker could possibly\n use this issue to expose sensitive information. (CVE-2023-42119)\n",
  "id": "USN-6455-2",
  "modified": "2026-06-10T12:22:10Z",
  "published": "2026-06-10T12:22:10Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6455-2"
    },
    {
      "type": "REPORT",
      "url": "https://launchpad.net/bugs/2152830"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "exim4 regression",
  "upstream": []
}



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