CVE-2025-58181 (GCVE-0-2025-58181)

Vulnerability from cvelistv5 – Published: 2025-11-19 20:33 – Updated: 2025-11-20 17:14
VLAI
Title
Unbounded memory consumption in golang.org/x/crypto/ssh
Summary
SSH servers parsing GSSAPI authentication requests do not validate the number of mechanisms specified in the request, allowing an attacker to cause unbounded memory consumption.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-11-19 20:49 UTC
CWE
Assigner
Go CNA under the Google root
CNA scorecard E 42/100 over 75 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
golang.org/x/crypto golang.org/x/crypto/ssh Affected: 0 , < 0.45.0 (semver)
guessed Create a notification for this product.
Credits
Jakub Ciolek
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "LOW",
              "baseScore": 5.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-58181",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-11-19T20:49:06.918113Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-770",
                "description": "CWE-770 Allocation of Resources Without Limits or Throttling",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-11-19T20:49:26.800Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh",
          "product": "golang.org/x/crypto/ssh",
          "programRoutines": [
            {
              "name": "parseGSSAPIPayload"
            },
            {
              "name": "NewServerConn"
            }
          ],
          "vendor": "golang.org/x/crypto",
          "versions": [
            {
              "lessThan": "0.45.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Jakub Ciolek"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "SSH servers parsing GSSAPI authentication requests do not validate the number of mechanisms specified in the request, allowing an attacker to cause unbounded memory consumption."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-1284",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-11-20T17:14:59.856Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://groups.google.com/g/golang-announce/c/w-oX3UxNcZA"
        },
        {
          "url": "https://go.dev/cl/721961"
        },
        {
          "url": "https://go.dev/issue/76363"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2025-4134"
        }
      ],
      "title": "Unbounded memory consumption in golang.org/x/crypto/ssh"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2025-58181",
    "datePublished": "2025-11-19T20:33:42.795Z",
    "dateReserved": "2025-08-27T14:50:58.691Z",
    "dateUpdated": "2025-11-20T17:14:59.856Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-58181",
      "date": "2026-10-09",
      "epss": "0.00561",
      "percentile": "0.44985"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "collectionURL": "https://pkg.go.dev",
                "defaultStatus": "unaffected",
                "packageName": "golang.org/x/crypto/ssh",
                "product": "golang.org/x/crypto/ssh",
                "programRoutines": [
                  {
                    "name": "parseGSSAPIPayload"
                  },
                  {
                    "name": "NewServerConn"
                  }
                ],
                "vendor": "golang.org/x/crypto",
                "versions": [
                  {
                    "lessThan": "0.45.0",
                    "status": "affected",
                    "version": "0",
                    "versionType": "semver"
                  }
                ]
              }
            ],
            "source": "security@golang.org"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:golang:crypto:*:*:*:*:*:go:*:*",
                    "matchCriteriaId": "0DB7D01D-5361-40FC-83A9-91A601A0321D",
                    "versionEndExcluding": "0.45.0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "SSH servers parsing GSSAPI authentication requests do not validate the number of mechanisms specified in the request, allowing an attacker to cause unbounded memory consumption."
          }
        ],
        "id": "CVE-2025-58181",
        "lastModified": "2026-06-17T09:44:01.527",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "LOW",
                "baseScore": 5.3,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 1.4,
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2025-58181",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "yes"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-11-19T20:49:06.918113Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2025-11-19T21:15:50.850",
        "references": [
          {
            "source": "security@golang.org",
            "tags": [
              "Patch"
            ],
            "url": "https://go.dev/cl/721961"
          },
          {
            "source": "security@golang.org",
            "tags": [
              "Issue Tracking"
            ],
            "url": "https://go.dev/issue/76363"
          },
          {
            "source": "security@golang.org",
            "tags": [
              "Mailing List"
            ],
            "url": "https://groups.google.com/g/golang-announce/c/w-oX3UxNcZA"
          },
          {
            "source": "security@golang.org",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://pkg.go.dev/vuln/GO-2025-4134"
          }
        ],
        "sourceIdentifier": "security@golang.org",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-770"
              }
            ],
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-08T22:50:25+00:00",
      "cve": "CVE-2025-58181",
      "id": "CVE-2025-58181",
      "initial_release_date": "2025-11-19T20:33:42.795000+00:00",
      "product_status:fixed": "130",
      "product_status:known_affected": "24",
      "product_status:known_not_affected": "129",
      "product_status:under_investigation": "354",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via unbounded memory consumption in GSSAPI authentication",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-58181.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-04T16:52:17Z",
      "cve": "CVE-2025-58181",
      "id": "CVE-2025-58181",
      "initial_release_date": "2025-11-21T00:23:34Z",
      "product_status:known_affected": "1115",
      "product_status:known_not_affected": "256",
      "product_status:recommended": "508",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-58181",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-58181.json",
      "version": "101"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "cvssV3_1": {
                  "attackComplexity": "LOW",
                  "attackVector": "NETWORK",
                  "availabilityImpact": "LOW",
                  "baseScore": 5.3,
                  "baseSeverity": "MEDIUM",
                  "confidentialityImpact": "NONE",
                  "integrityImpact": "NONE",
                  "privilegesRequired": "NONE",
                  "scope": "UNCHANGED",
                  "userInteraction": "NONE",
                  "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "version": "3.1"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2025-58181",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "yes"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2025-11-19T20:49:06.918113Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-770",
                    "description": "CWE-770 Allocation of Resources Without Limits or Throttling",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2025-11-19T20:48:46.369Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "collectionURL": "https://pkg.go.dev",
              "defaultStatus": "unaffected",
              "packageName": "golang.org/x/crypto/ssh",
              "product": "golang.org/x/crypto/ssh",
              "programRoutines": [
                {
                  "name": "parseGSSAPIPayload"
                },
                {
                  "name": "NewServerConn"
                }
              ],
              "vendor": "golang.org/x/crypto",
              "versions": [
                {
                  "lessThan": "0.45.0",
                  "status": "affected",
                  "version": "0",
                  "versionType": "semver"
                }
              ]
            }
          ],
          "credits": [
            {
              "lang": "en",
              "value": "Jakub Ciolek"
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "SSH servers parsing GSSAPI authentication requests do not validate the number of mechanisms specified in the request, allowing an attacker to cause unbounded memory consumption."
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "description": "CWE-1284",
                  "lang": "en"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-11-20T17:14:59.856Z",
            "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
            "shortName": "Go"
          },
          "references": [
            {
              "url": "https://groups.google.com/g/golang-announce/c/w-oX3UxNcZA"
            },
            {
              "url": "https://go.dev/cl/721961"
            },
            {
              "url": "https://go.dev/issue/76363"
            },
            {
              "url": "https://pkg.go.dev/vuln/GO-2025-4134"
            }
          ],
          "title": "Unbounded memory consumption in golang.org/x/crypto/ssh"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "assignerShortName": "Go",
        "cveId": "CVE-2025-58181",
        "datePublished": "2025-11-19T20:33:42.795Z",
        "dateReserved": "2025-08-27T14:50:58.691Z",
        "dateUpdated": "2025-11-20T17:14:59.856Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.



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.