Vulnerability-Lookup

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

6.5 (Medium)


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

CWE

CWE-476

Assigner

redhat redhat root

References

6 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

1 product

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

Show details on NVD website

JSON

To clipboard

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    },
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T14:52:26+00:00",
      "cve": "CVE-2023-1667",
      "id": "CVE-2023-1667",
      "initial_release_date": "2023-04-30T00:00:00+00:00",
      "product_status:fixed": "132",
      "product_status:known_affected": "2",
      "product_status:known_not_affected": "2",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "libssh: NULL pointer dereference during rekeying with algorithm guessing",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-1667.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-29T02:17:31Z",
      "cve": "CVE-2023-1667",
      "id": "CVE-2023-1667",
      "initial_release_date": "2023-05-09T02:03:36Z",
      "product_status:known_affected": "234",
      "product_status:known_not_affected": "184",
      "product_status:recommended": "332",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-1667",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-1667.json",
      "version": "55"
    }
  }
}

ubuntu-cve-2023-1667

Vulnerability from osv_ubuntu

Published

2023-05-09 00:00

Modified

2026-04-22 07:44

Summary

Details

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

6.5 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2023-1667	REPORT
	https://www.libssh.org/security/advisories/CVE-20…	REPORT
	https://ubuntu.com/security/notices/USN-6138-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2023-1667	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libssh-4",
            "binary_version": "0.6.3-4.3ubuntu0.6+esm5"
          },
          {
            "binary_name": "libssh-gcrypt-4",
            "binary_version": "0.6.3-4.3ubuntu0.6+esm5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "libssh",
        "purl": "pkg:deb/ubuntu/libssh@0.6.3-4.3ubuntu0.6+esm5?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.6.3-3ubuntu3",
        "0.6.3-4.1",
        "0.6.3-4.2",
        "0.6.3-4.2ubuntu1",
        "0.6.3-4.3",
        "0.6.3-4.3ubuntu0.1",
        "0.6.3-4.3ubuntu0.2",
        "0.6.3-4.3ubuntu0.5",
        "0.6.3-4.3ubuntu0.6",
        "0.6.3-4.3ubuntu0.6+esm1",
        "0.6.3-4.3ubuntu0.6+esm2",
        "0.6.3-4.3ubuntu0.6+esm3",
        "0.6.3-4.3ubuntu0.6+esm4",
        "0.6.3-4.3ubuntu0.6+esm5"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libssh-4",
            "binary_version": "0.8.0~20170825.94fa1e38-1ubuntu0.7+esm7"
          },
          {
            "binary_name": "libssh-gcrypt-4",
            "binary_version": "0.8.0~20170825.94fa1e38-1ubuntu0.7+esm7"
          }
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      },
      "package": {
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      },
      "ranges": [
        {
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            {
              "introduced": "0"
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          ],
          "type": "ECOSYSTEM"
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      ],
      "versions": [
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        "0.8.0~20170825.94fa1e38-1",
        "0.8.0~20170825.94fa1e38-1build1",
        "0.8.0~20170825.94fa1e38-1ubuntu0.1",
        "0.8.0~20170825.94fa1e38-1ubuntu0.2",
        "0.8.0~20170825.94fa1e38-1ubuntu0.5",
        "0.8.0~20170825.94fa1e38-1ubuntu0.6",
        "0.8.0~20170825.94fa1e38-1ubuntu0.7",
        "0.8.0~20170825.94fa1e38-1ubuntu0.7+esm3",
        "0.8.0~20170825.94fa1e38-1ubuntu0.7+esm4",
        "0.8.0~20170825.94fa1e38-1ubuntu0.7+esm5",
        "0.8.0~20170825.94fa1e38-1ubuntu0.7+esm6",
        "0.8.0~20170825.94fa1e38-1ubuntu0.7+esm7"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libssh-4",
            "binary_version": "0.9.3-2ubuntu2.3"
          },
          {
            "binary_name": "libssh-gcrypt-4",
            "binary_version": "0.9.3-2ubuntu2.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libssh",
        "purl": "pkg:deb/ubuntu/libssh@0.9.3-2ubuntu2.3?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
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            }
          ],
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        }
      ],
      "versions": [
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      ]
    },
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      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libssh-4",
            "binary_version": "0.9.6-2ubuntu0.22.04.1"
          },
          {
            "binary_name": "libssh-gcrypt-4",
            "binary_version": "0.9.6-2ubuntu0.22.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libssh",
        "purl": "pkg:deb/ubuntu/libssh@0.9.6-2ubuntu0.22.04.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.9.6-2ubuntu0.22.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.9.6-1",
        "0.9.6-1build1",
        "0.9.6-2",
        "0.9.6-2build1"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2023-1667",
  "modified": "2026-04-22T07:44:57Z",
  "published": "2023-05-09T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-1667"
    },
    {
      "type": "REPORT",
      "url": "https://www.libssh.org/security/advisories/CVE-2023-1667.txt"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6138-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-1667"
    }
  ],
  "related": [
    "USN-6138-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2023-1667"
  ]
}

WID-SEC-W-2023-1159

Vulnerability from csaf_certbund - Published: 2023-05-04 22:00 - Updated: 2026-01-25 23:00

Summary

libssh: Mehrere Schwachstellen ermöglichen Umgehung von Sicherheitsvorkehrungen

Severity

Mittel

Scope

2 vulnerabilities in this advisory, including CVE-2023-1667.

CVE-2023-1667

Known affected: 23 products

Open the full advisory

WID-SEC-W-2023-2112

Vulnerability from csaf_certbund - Published: 2023-08-22 22:00 - Updated: 2023-08-22 22:00

Summary

IBM Spectrum Protect: Mehrere Schwachstellen

Severity

Hoch

Scope

33 vulnerabilities in this advisory, including CVE-2023-1667.

CVE-2023-1667

In IBM Spectrum Protect existieren mehrere Schwachstellen. Diese bestehen in den Komponenten Linux Kernel, libssh und Java. Ein lokaler oder entfernter Angreifer kann diese Schwachstellen ausnutzen, um seine Privilegien zu erweitern, beliebigen Programmcode auszuführen, einen Denial of Service Zustand herbeizuführen, Sicherheitsvorkehrungen zu umgehen oder unbekannte Auswirkungen zu verursachen.

Open the full advisory

WID-SEC-W-2024-3377

Vulnerability from csaf_certbund - Published: 2024-11-07 23:00 - Updated: 2025-10-12 22:00

Summary

Dell PowerProtect Data Domain: Mehrere Schwachstellen

Severity

Mittel

Scope

124 vulnerabilities in this advisory, including CVE-2023-1667.

CVE-2023-1667

Known affected: 8 products

Open the full advisory

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.

Detection rules are retrieved from Rulezet.

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

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

ubuntu-cve-2023-1667

Vulnerability from osv_ubuntu

WID-SEC-W-2023-1159

WID-SEC-W-2023-2112

WID-SEC-W-2024-3377

Tags

Sightings

Nomenclature

Related by attack behaviour