{
  "document": {
    "aggregate_severity": {
      "text": "Moderate"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "TuxCare License Agreement",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
      },
      {
        "category": "details",
        "text": "CVE-2024-23185: fix resource exhaustion caused by very large headers when\n  parsing messages",
        "title": "Details"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://tuxcare.com/contact/",
      "name": "TuxCare",
      "namespace": "https://tuxcare.com/"
    },
    "references": [
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.tuxcare.com/csaf/v2/els_os/almalinux9.2esu/advisories/2025/clsa-2025_1753987188.json"
      },
      {
        "category": "self",
        "summary": "https://cve.tuxcare.com/els/releases/CLSA-2025:1753987188",
        "url": "https://cve.tuxcare.com/els/releases/CLSA-2025:1753987188"
      }
    ],
    "tracking": {
      "current_release_date": "2026-02-16T09:33:21Z",
      "generator": {
        "date": "2026-02-16T09:33:21Z",
        "engine": {
          "name": "pyCSAF"
        }
      },
      "id": "CLSA-2025:1753987188",
      "initial_release_date": "2025-07-31T18:40:27Z",
      "revision_history": [
        {
          "date": "2025-07-31T18:40:27Z",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-02-16T09:33:21Z",
          "number": "2",
          "summary": "Update document"
        }
      ],
      "status": "final",
      "version": "2"
    },
    "title": "dovecot: Fix of CVE-2024-23185"
  },
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  "vulnerabilities": [
    {
      "cve": "CVE-2024-23185",
      "cwe": {
        "id": "CWE-770",
        "name": "Allocation of Resources Without Limits or Throttling"
      },
      "notes": [
        {
          "category": "description",
          "text": "Very large headers can cause resource exhaustion when parsing message. The message-parser normally reads reasonably sized chunks of the message. However, when it feeds them to message-header-parser, it starts building up \"full_value\" buffer out of the smaller chunks. The full_value buffer has no size limit, so large headers can cause large memory usage. It doesn't matter whether it's a single long header line, or a single header split into multiple lines. This bug exists in all Dovecot versions. Incoming mails typically have some size limits set by MTA, so even largest possible header size may still fit into Dovecot's vsz_limit. So attackers probably can't DoS a victim user this way. A user could APPEND larger mails though, allowing them to DoS themselves (although maybe cause some memory issues for the backend in general). One can implement restrictions on headers on MTA component preceding Dovecot. No publicly available exploits are known.",
          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
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          "AlmaLinux-9.2:dovecot-1:2.3.16-8.el9.tuxcare.els2.x86_64",
          "AlmaLinux-9.2:dovecot-devel-1:2.3.16-8.el9.tuxcare.els2.i686",
          "AlmaLinux-9.2:dovecot-devel-1:2.3.16-8.el9.tuxcare.els2.x86_64",
          "AlmaLinux-9.2:dovecot-mysql-1:2.3.16-8.el9.tuxcare.els2.x86_64",
          "AlmaLinux-9.2:dovecot-pgsql-1:2.3.16-8.el9.tuxcare.els2.x86_64",
          "AlmaLinux-9.2:dovecot-pigeonhole-1:2.3.16-8.el9.tuxcare.els2.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2024-23185"
        }
      ],
      "release_date": "2024-08-15T00:00:00Z",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2025-07-31T18:39:50.903799Z",
          "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2025:1753987188",
          "product_ids": [
            "AlmaLinux-9.2:dovecot-1:2.3.16-8.el9.tuxcare.els2.i686",
            "AlmaLinux-9.2:dovecot-1:2.3.16-8.el9.tuxcare.els2.x86_64",
            "AlmaLinux-9.2:dovecot-devel-1:2.3.16-8.el9.tuxcare.els2.i686",
            "AlmaLinux-9.2:dovecot-devel-1:2.3.16-8.el9.tuxcare.els2.x86_64",
            "AlmaLinux-9.2:dovecot-mysql-1:2.3.16-8.el9.tuxcare.els2.x86_64",
            "AlmaLinux-9.2:dovecot-pgsql-1:2.3.16-8.el9.tuxcare.els2.x86_64",
            "AlmaLinux-9.2:dovecot-pigeonhole-1:2.3.16-8.el9.tuxcare.els2.x86_64"
          ],
          "url": "https://cve.tuxcare.com/els/releases/CLSA-2025:1753987188"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H",
            "version": "3.1"
          },
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        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ]
    }
  ]
}