Vulnerability-Lookup

alsa-2023:6643

Vulnerability from osv_almalinux

Published

2023-11-07 00:00

Modified

2023-11-14 12:11

Summary

Moderate: libssh security update

Details

libssh is a library which implements the SSH protocol. It can be used to implement client and server applications.

Security Fix(es):

libssh: NULL pointer dereference during rekeying with algorithm guessing (CVE-2023-1667)
libssh: authorization bypass in pki_verify_data_signature (CVE-2023-2283)

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.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

References

URL

Type

	https://access.redhat.com/errata/RHSA-2023:6643	ADVISORY
	https://access.redhat.com/security/cve/CVE-2023-1667	REPORT
	https://access.redhat.com/security/cve/CVE-2023-2283	REPORT
	https://bugzilla.redhat.com/2182199	REPORT
	https://bugzilla.redhat.com/2189736	REPORT
	https://errata.almalinux.org/9/ALSA-2023-6643.html	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "libssh"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.10.4-11.el9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "libssh-config"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.10.4-11.el9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "libssh-devel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.10.4-11.el9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "libssh is a library which implements the SSH protocol. It can be used to implement client and server applications.\n\nSecurity Fix(es):\n\n* libssh: NULL pointer dereference during rekeying with algorithm guessing (CVE-2023-1667)\n* libssh: authorization bypass in pki_verify_data_signature (CVE-2023-2283)\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\nAdditional Changes:\n\nFor detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.",
  "id": "ALSA-2023:6643",
  "modified": "2023-11-14T12:11:04Z",
  "published": "2023-11-07T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2023:6643"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2023-1667"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2023-2283"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2182199"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2189736"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/9/ALSA-2023-6643.html"
    }
  ],
  "related": [
    "CVE-2023-1667",
    "CVE-2023-2283"
  ],
  "summary": "Moderate: libssh security update"
}

CVE-2023-2283 (GCVE-0-2023-2283)

Vulnerability from cvelistv5 – Published: 2023-05-26 00:00 – Updated: 2025-11-03 20:35

Summary

A vulnerability was found in libssh, where the authentication check of the connecting client can be bypassed in the`pki_verify_data_signature` function in memory allocation problems. This issue may happen if there is insufficient memory or the memory usage is limited. The problem is caused by the return value `rc,` which is initialized to SSH_ERROR and later rewritten to save the return value of the function call `pki_key_check_hash_compatible.` The value of the variable is not changed between this point and the cryptographic verification. Therefore any error between them calls `goto error` returning SSH_OK.

Severity ?

No CVSS data available.

CWE

CWE-287

Assigner

redhat

References

URL

Tags

	https://access.redhat.com/security/cve/CVE-2023-2283
	https://www.libssh.org/security/advisories/CVE-20…
	https://bugzilla.redhat.com/show_bug.cgi?id=2189736
	https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
	http://packetstormsecurity.com/files/172861/libss…
	https://security.gentoo.org/glsa/202312-05	vendor-advisory
	https://security.netapp.com/advisory/ntap-2024020…

Impacted products

	Vendor	Product	Version
	n/a	libssh	Affected: libssh-2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T20:35:18.528Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://access.redhat.com/security/cve/CVE-2023-2283"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.libssh.org/security/advisories/CVE-2023-2283.txt"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2189736"
          },
          {
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            "tags": [
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            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/27PD44ALQTZXX7K6JAM3BXBUHYA6DFFN/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "http://packetstormsecurity.com/files/172861/libssh-0.9.6-0.10.4-pki_verify_data_signature-Authorization-Bypass.html"
          },
          {
            "name": "GLSA-202312-05",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202312-05"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20240201-0005/"
          },
          {
            "url": "http://seclists.org/fulldisclosure/2025/Feb/18"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "libssh",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "libssh-2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability was found in libssh, where the authentication check of the connecting client can be bypassed in the`pki_verify_data_signature` function in memory allocation problems. This issue may happen if there is insufficient memory or the memory usage is limited. The problem is caused by the return value `rc,` which is initialized to SSH_ERROR and later rewritten to save the return value of the function call `pki_key_check_hash_compatible.` The value of the variable is not changed between this point and the cryptographic verification. Therefore any error between them calls `goto error` returning SSH_OK."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-287",
              "description": "CWE-287",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-02-01T17:06:59.699Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "url": "https://access.redhat.com/security/cve/CVE-2023-2283"
        },
        {
          "url": "https://www.libssh.org/security/advisories/CVE-2023-2283.txt"
        },
        {
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2189736"
        },
        {
          "name": "FEDORA-2023-5fa5ca2043",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/27PD44ALQTZXX7K6JAM3BXBUHYA6DFFN/"
        },
        {
          "url": "http://packetstormsecurity.com/files/172861/libssh-0.9.6-0.10.4-pki_verify_data_signature-Authorization-Bypass.html"
        },
        {
          "name": "GLSA-202312-05",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.gentoo.org/glsa/202312-05"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20240201-0005/"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2023-2283",
    "datePublished": "2023-05-26T00:00:00.000Z",
    "dateReserved": "2023-04-25T00:00:00.000Z",
    "dateUpdated": "2025-11-03T20:35:18.528Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2023-1667 (GCVE-0-2023-1667)

Vulnerability from cvelistv5 – Published: 2023-05-26 00:00 – Updated: 2024-08-02 05:57

Summary

A NULL pointer dereference was found In libssh during re-keying with algorithm guessing. This issue may allow an authenticated client to cause a denial of service.

Severity ?

No CVSS data available.

CWE

CWE-476

Assigner

redhat

References

URL

Tags

	https://access.redhat.com/security/cve/CVE-2023-1667
	https://bugzilla.redhat.com/show_bug.cgi?id=2182199
	http://www.libssh.org/security/advisories/CVE-202…
	https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
	https://lists.debian.org/debian-lts-announce/2023…	mailing-list
	https://security.gentoo.org/glsa/202312-05	vendor-advisory

Impacted products

	Vendor	Product	Version
	n/a	libssh	Affected: libssh-2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T05:57:24.326Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://access.redhat.com/security/cve/CVE-2023-1667"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2182199"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "http://www.libssh.org/security/advisories/CVE-2023-1667.txt"
          },
          {
            "name": "FEDORA-2023-5fa5ca2043",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/27PD44ALQTZXX7K6JAM3BXBUHYA6DFFN/"
          },
          {
            "name": "[debian-lts-announce] 20230529 [SECURITY] [DLA 3437-1] libssh security update",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2023/05/msg00029.html"
          },
          {
            "name": "GLSA-202312-05",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202312-05"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "libssh",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "libssh-2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A NULL pointer dereference was found In libssh during re-keying with algorithm guessing. This issue may allow an authenticated client to cause a denial of service."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-476",
              "description": "CWE-476",
              "lang": "en",
              "type": "CWE"
            }
          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2023-12-22T10:06:17.929Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "url": "https://access.redhat.com/security/cve/CVE-2023-1667"
        },
        {
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2182199"
        },
        {
          "url": "http://www.libssh.org/security/advisories/CVE-2023-1667.txt"
        },
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          "name": "FEDORA-2023-5fa5ca2043",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/27PD44ALQTZXX7K6JAM3BXBUHYA6DFFN/"
        },
        {
          "name": "[debian-lts-announce] 20230529 [SECURITY] [DLA 3437-1] libssh security update",
          "tags": [
            "mailing-list"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2023/05/msg00029.html"
        },
        {
          "name": "GLSA-202312-05",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.gentoo.org/glsa/202312-05"
        }
      ]
    }
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  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2023-1667",
    "datePublished": "2023-05-26T00:00:00.000Z",
    "dateReserved": "2023-03-27T00:00:00.000Z",
    "dateUpdated": "2024-08-02T05:57:24.326Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

Action not permitted

alsa-2023:6643

Vulnerability from osv_almalinux

CVE-2023-2283 (GCVE-0-2023-2283)

CVE-2023-1667 (GCVE-0-2023-1667)

Tags

Sightings

Nomenclature