CVE-2023-1667

libssh: NULL pointer dereference during rekeying with algorithm guessing

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-03-27 CVE Reserved
2023-05-23 CVE Published
2024-08-02 CVE Updated
2024-08-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-476: NULL Pointer Dereference

CAPEC

References (6)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2023/05/msg00029.html	Mailing List

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://www.libssh.org/security/advisories/CVE-2023-1667.txt	2023-12-22
https://access.redhat.com/security/cve/CVE-2023-1667	2023-12-22
https://bugzilla.redhat.com/show_bug.cgi?id=2182199	2023-12-22
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/27PD44ALQTZXX7K6JAM3BXBUHYA6DFFN	2023-12-22
https://security.gentoo.org/glsa/202312-05	2023-12-22

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Libssh Search vendor "Libssh"		Libssh Search vendor "Libssh" for product "Libssh"				>= 0.9.1 <= 0.9.6 Search vendor "Libssh" for product "Libssh" and version " >= 0.9.1 <= 0.9.6"		-		Affected
Libssh Search vendor "Libssh"		Libssh Search vendor "Libssh" for product "Libssh"				>= 0.10.0 <= 0.10.4 Search vendor "Libssh" for product "Libssh" and version " >= 0.10.0 <= 0.10.4"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				37 Search vendor "Fedoraproject" for product "Fedora" and version "37"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				9.0 Search vendor "Redhat" for product "Enterprise Linux" and version "9.0"		-		Affected