Vulnerability-Lookup

RHSA-2024:6529

Vulnerability from csaf_opensuse - Published: 2024-09-10 00:00 - Updated: 2026-09-20 11:42

Summary

security update for dovecot

Severity

Low

Notes

Title of the patch: security update for dovecot

Description of the patch: This security update provides a functional equivalent of RHSA-2024:6529. The original Red Hat(R) advisory is available from the Red Hat web site at https://access.redhat.com/errata/RHSA-2024:6529.

Patchnames: RHSA-2024:6529

CVE-2024-23184

5.8 (Medium)


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

Affected products

Recommended 7 products

Product	Version	Remediation
Unresolved product id: SUSE Liberty Linux 9:dovecot-1:2.3.16-11.el9_4.1.i686	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:dovecot-1:2.3.16-11.el9_4.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:dovecot-devel-1:2.3.16-11.el9_4.1.i686	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:dovecot-devel-1:2.3.16-11.el9_4.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:dovecot-mysql-1:2.3.16-11.el9_4.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:dovecot-pgsql-1:2.3.16-11.el9_4.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:dovecot-pigeonhole-1:2.3.16-11.el9_4.1.x86_64	—	Vendor Fix

Threats

Impact moderate

CVE-2024-23185

5.9 (Medium)


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

Affected products

Recommended 7 products, the same list as for CVE-2024-23184

Threats

Impact moderate

References

10 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/r…	self
https://lists.suse.com/pipermail/suse-liberty-lin…	self
https://lists.suse.com/pipermail/suse-liberty-lin…	self
https://www.suse.com/security/cve/CVE-2024-23184/	self
https://www.suse.com/security/cve/CVE-2024-23185/	self
https://www.suse.com/security/cve/CVE-2024-23184	external
https://bugzilla.suse.com/1229184	external
https://www.suse.com/security/cve/CVE-2024-23185	external
https://bugzilla.suse.com/1229183	external

JSON

To clipboard

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          "text": "https://www.suse.com/security/cve/CVE-2024-23184"
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        {
          "category": "general",
          "text": "Having a large number of address headers (From, To, Cc, Bcc, etc.) becomes excessively CPU intensive. With 100k header lines CPU usage is already 12 seconds, and in a production environment we observed 500k header lines taking 18 minutes to parse. Since this can be triggered by external actors sending emails to a victim, this is a security issue. An external attacker can send specially crafted messages that consume target system resources and cause outage. One can implement restrictions on address headers on MTA component preceding Dovecot. No publicly available exploits are known.",
          "title": "CVE description"
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          "text": "https://www.suse.com/security/cve/CVE-2024-23185"
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        {
          "category": "general",
          "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\u0027t matter whether it\u0027s 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\u0027s vsz_limit. So attackers probably can\u0027t 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": "CVE description"
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        {
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          "summary": "SUSE Bug 1229183 for CVE-2024-23185",
          "url": "https://bugzilla.suse.com/1229183"
        }
      ],
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        {
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          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Liberty Linux 9:dovecot-1:2.3.16-11.el9_4.1.i686",
            "SUSE Liberty Linux 9:dovecot-1:2.3.16-11.el9_4.1.x86_64",
            "SUSE Liberty Linux 9:dovecot-devel-1:2.3.16-11.el9_4.1.i686",
            "SUSE Liberty Linux 9:dovecot-devel-1:2.3.16-11.el9_4.1.x86_64",
            "SUSE Liberty Linux 9:dovecot-mysql-1:2.3.16-11.el9_4.1.x86_64",
            "SUSE Liberty Linux 9:dovecot-pgsql-1:2.3.16-11.el9_4.1.x86_64",
            "SUSE Liberty Linux 9:dovecot-pigeonhole-1:2.3.16-11.el9_4.1.x86_64"
          ]
        }
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      "scores": [
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            "SUSE Liberty Linux 9:dovecot-devel-1:2.3.16-11.el9_4.1.x86_64",
            "SUSE Liberty Linux 9:dovecot-mysql-1:2.3.16-11.el9_4.1.x86_64",
            "SUSE Liberty Linux 9:dovecot-pgsql-1:2.3.16-11.el9_4.1.x86_64",
            "SUSE Liberty Linux 9:dovecot-pigeonhole-1:2.3.16-11.el9_4.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2024-09-10T00:00:00Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2024-23185"
    }
  ]
}

CVE-2024-23184 (GCVE-0-2024-23184)

Vulnerability from cvelistv5 – Published: 2024-09-10 14:33 – Updated: 2025-11-04 16:11

Summary

Having a large number of address headers (From, To, Cc, Bcc, etc.) becomes excessively CPU intensive. With 100k header lines CPU usage is already 12 seconds, and in a production environment we observed 500k header lines taking 18 minutes to parse. Since this can be triggered by external actors sending emails to a victim, this is a security issue. An external attacker can send specially crafted messages that consume target system resources and cause outage. One can implement restrictions on address headers on MTA component preceding Dovecot. No publicly available exploits are known.

Severity

5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 15:33 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

OX mitre root

References

4 references

URL	Tags
https://documentation.open-xchange.com/dovecot/se…	vendor-advisory
http://www.openwall.com/lists/oss-security/2024/08/15/3
http://seclists.org/fulldisclosure/2024/Aug/17
https://lists.debian.org/debian-lts-announce/2024…

Impacted products

1 product

Vendor	Product	Version
Open-Xchange GmbH	OX Dovecot Pro	Affected: 0 , ≤ 2.3.21 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-04T16:11:12.830Z",
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            "url": "https://lists.debian.org/debian-lts-announce/2024/09/msg00002.html"
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        "providerMetadata": {
          "dateUpdated": "2024-09-10T15:34:07.961Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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              "status": "affected",
              "version": "0",
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        }
      ],
      "metrics": [
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            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N",
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          "descriptions": [
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              "cweId": "CWE-770",
              "description": "Allocation of Resources Without Limits or Throttling",
              "lang": "en",
              "type": "cwe"
            }
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      "providerMetadata": {
        "dateUpdated": "2024-09-10T14:33:34.166Z",
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    "datePublished": "2024-09-10T14:33:34.166Z",
    "dateReserved": "2024-01-12T07:03:12.862Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2024-23185 (GCVE-0-2024-23185)

Vulnerability from cvelistv5 – Published: 2024-09-10 14:38 – Updated: 2025-11-04 16:11

Summary

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.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 19:14 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

OX mitre root

References

4 references

URL	Tags
https://documentation.open-xchange.com/dovecot/se…	vendor-advisory
http://www.openwall.com/lists/oss-security/2024/08/15/4
http://seclists.org/fulldisclosure/2024/Aug/18
https://lists.debian.org/debian-lts-announce/2024…

Impacted products

2 products

Vendor	Product	Version
Open-Xchange GmbH	OX Dovecot Pro	Affected: 0 , ≤ 2.3.21 (semver)
open-xchange	ox_dovecot_pro	Affected: 0 , ≤ 2.3.21 (custom) cpe:2.3:a:open-xchange:ox_dovecot_pro::::::::

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-04T16:11:13.766Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2024/08/15/4"
          },
          {
            "url": "http://seclists.org/fulldisclosure/2024/Aug/18"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2024/09/msg00002.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:a:open-xchange:ox_dovecot_pro:*:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "ox_dovecot_pro",
            "vendor": "open-xchange",
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                "status": "affected",
                "version": "0",
                "versionType": "custom"
              }
            ]
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        "metrics": [
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                "id": "CVE-2024-23185",
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                    "Exploitation": "none"
                  },
                  {
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                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T19:14:08.131462Z",
                "version": "2.0.3"
              },
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            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-10T19:19:51.788Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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          "modules": [
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          "product": "OX Dovecot Pro",
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              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
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          "lang": "en",
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
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            "privilegesRequired": "NONE",
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            "userInteraction": "NONE",
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        {
          "tags": [
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          "url": "https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2024/oxdc-adv-2024-0003.json"
        }
      ],
      "source": {
        "defect": "DOV-6601",
        "discovery": "INTERNAL"
      }
    }
  },
  "cveMetadata": {
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Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

RHSA-2024:6529

CVE-2024-23184 (GCVE-0-2024-23184)

CVE-2024-23185 (GCVE-0-2024-23185)

Tags

Sightings

Nomenclature

Related by attack behaviour