Vulnerability-Lookup

alsa-2026:3032

Vulnerability from osv_almalinux

Published

2026-02-23 00:00

Modified

2026-02-23 14:44

Summary

Important: munge security update

Details

MUNGE (MUNGE Uid 'N' Gid Emporium) is an authentication service for creating and validating credentials. It is designed to be highly scalable for use in an HPC cluster environment. It allows a process to authenticate the UID and GID of another local or remote process within a group of hosts having common users and groups. These hosts form a security realm that is defined by a shared cryptographic key. Clients within this security realm can create and validate credentials without the use of root privileges, reserved ports, or platform-specific methods.

Security Fix(es):

MUNGE: MUNGE has a buffer overflow in message unpacking allows key leakage and credential forgery (CVE-2026-25506)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:8",
        "name": "munge"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.5.13-3.el8_10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:8",
        "name": "munge-devel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.5.13-3.el8_10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:8",
        "name": "munge-libs"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.5.13-3.el8_10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "MUNGE (MUNGE Uid \u0027N\u0027 Gid Emporium) is an authentication service for creating and validating credentials. It is designed to be highly scalable for use in an HPC cluster environment. It allows a process to authenticate the UID and GID of another local or remote process within a group of hosts having common users and groups. These hosts form a security realm that is defined by a shared cryptographic key. Clients within this security realm can create and validate credentials without the use of root privileges, reserved ports, or platform-specific methods.  \n\nSecurity Fix(es):  \n\n  * MUNGE: MUNGE has a buffer overflow in message unpacking allows key leakage and credential forgery (CVE-2026-25506)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
  "id": "ALSA-2026:3032",
  "modified": "2026-02-23T14:44:19Z",
  "published": "2026-02-23T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:3032"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-25506"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2438715"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/8/ALSA-2026-3032.html"
    }
  ],
  "related": [
    "CVE-2026-25506"
  ],
  "summary": "Important: munge security update"
}

CVE-2026-25506 (GCVE-0-2026-25506)

Vulnerability from cvelistv5 – Published: 2026-02-10 18:55 – Updated: 2026-02-17 18:17

Title

MUNGE has a buffer overflow in message unpacking allows key leakage and credential forgery

Summary

MUNGE is an authentication service for creating and validating user credentials. From 0.5 to 0.5.17, local attacker can exploit a buffer overflow vulnerability in munged (the MUNGE authentication daemon) to leak cryptographic key material from process memory. With the leaked key material, the attacker could forge arbitrary MUNGE credentials to impersonate any user (including root) to services that rely on MUNGE for authentication. The vulnerability allows a buffer overflow by sending a crafted message with an oversized address length field, corrupting munged's internal state and enabling extraction of the MAC subkey used for credential verification. This vulnerability is fixed in 0.5.18.

Severity ?

7.7 (High)


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

CWE

CWE-787 - Out-of-bounds Write

Assigner

GitHub_M

References

URL

Tags

	https://github.com/dun/munge/security/advisories/…	x_refsource_CONFIRM
	https://github.com/dun/munge/commit/bf40cc27c4ce8…	x_refsource_MISC
	https://github.com/dun/munge/releases/tag/munge-0.5.18	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	dun	munge	Affected: >= 0.5, < 0.5.18

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-25506",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-10T19:12:47.174130Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-02-10T19:13:33.822Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2026-02-17T18:17:47.022Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/02/10/3"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2026/02/msg00015.html"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/02/17/6"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "munge",
          "vendor": "dun",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 0.5, \u003c 0.5.18"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "MUNGE is an authentication service for creating and validating user credentials. From 0.5 to 0.5.17, local attacker can exploit a buffer overflow vulnerability in munged (the MUNGE authentication daemon) to leak cryptographic key material from process memory. With the leaked key material, the attacker could forge arbitrary MUNGE credentials to impersonate any user (including root) to services that rely on MUNGE for authentication. The vulnerability allows a buffer overflow by sending a crafted message with an oversized address length field, corrupting munged\u0027s internal state and enabling extraction of the MAC subkey used for credential verification. This vulnerability is fixed in 0.5.18."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "LOW",
            "baseScore": 7.7,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-787",
              "description": "CWE-787: Out-of-bounds Write",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-10T18:55:57.708Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/dun/munge/security/advisories/GHSA-r9cr-jf4v-75gh",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/dun/munge/security/advisories/GHSA-r9cr-jf4v-75gh"
        },
        {
          "name": "https://github.com/dun/munge/commit/bf40cc27c4ce8451d4b062c9de0b67ec40894812",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/dun/munge/commit/bf40cc27c4ce8451d4b062c9de0b67ec40894812"
        },
        {
          "name": "https://github.com/dun/munge/releases/tag/munge-0.5.18",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/dun/munge/releases/tag/munge-0.5.18"
        }
      ],
      "source": {
        "advisory": "GHSA-r9cr-jf4v-75gh",
        "discovery": "UNKNOWN"
      },
      "title": "MUNGE has a buffer overflow in message unpacking allows key leakage and credential forgery"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-25506",
    "datePublished": "2026-02-10T18:55:57.708Z",
    "dateReserved": "2026-02-02T18:21:42.486Z",
    "dateUpdated": "2026-02-17T18:17:47.022Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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