CVE-2023-1667 : A NULL pointer dereference was found In libssh during re-keying with algorithm g

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.

Published 2023-05-26 18:15:11

Updated 2023-12-22 10:15:11

Source Red Hat, Inc.

View at NVD, CVE.org

Vulnerability category: Memory CorruptionDenial of service

Products affected by CVE-2023-1667

Debian » Debian Linux » Version: 10.0
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
Matching versions
Redhat » Enterprise Linux » Version: 8.0
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
Matching versions
Redhat » Enterprise Linux » Version: 9.0
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
Matching versions
Fedoraproject » Fedora » Version: 37
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
Matching versions
Libssh » Libssh
Versions from including (>=) 0.9.1 and up to, including, (<=) 0.9.6
cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*
Matching versions
Libssh » Libssh
Versions from including (>=) 0.10.0 and up to, including, (<=) 0.10.4
cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*
Matching versions

Threat overview for CVE-2023-1667

Top countries where our scanners detected CVE-2023-1667

Top open port discovered on systems with this issue 53

IPs affected by CVE-2023-1667 3,689

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2023-1667!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2023-1667

EPSS FAQ

0.12%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 46 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2023-1667

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source	First Seen
6.5	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	2.8	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2023-1667

CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.
Assigned by:
- nvd@nist.gov (Primary)
- secalert@redhat.com (Secondary)

References for CVE-2023-1667

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/27PD44ALQTZXX7K6JAM3BXBUHYA6DFFN/

[SECURITY] Fedora 37 Update: libssh-0.10.5-1.fc37 - package-announce - Fedora Mailing-Lists
Mailing List;Third Party Advisory

CVEs referencing this url
https://lists.debian.org/debian-lts-announce/2023/05/msg00029.html

[SECURITY] [DLA 3437-1] libssh security update
Mailing List;Third Party Advisory

CVEs referencing this url
http://www.libssh.org/security/advisories/CVE-2023-1667.txt

Vendor Advisory
https://security.gentoo.org/glsa/202312-05

libssh: Multiple Vulnerabilities (GLSA 202312-05) — Gentoo security

CVEs referencing this url
https://access.redhat.com/security/cve/CVE-2023-1667

cve-details
Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2182199

2182199 – (CVE-2023-1667) CVE-2023-1667 libssh: NULL pointer dereference during rekeying with algorithm guessing
Issue Tracking;Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/27PD44ALQTZXX7K6JAM3BXBUHYA6DFFN/

[SECURITY] Fedora 37 Update: libssh-0.10.5-1.fc37 - package-announce - Fedora Mailing-Lists

CVEs referencing this url