CVE Vulnerabilities

CVE-2023-1667

NULL Pointer Dereference

Published: May 26, 2023 | Modified: Dec 22, 2023
CVSS 3.x
6.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
RedHat/V2
RedHat/V3
4.3 MODERATE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Ubuntu
MEDIUM

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.

Weakness

A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.

Affected Software

Name Vendor Start Version End Version
Libssh Libssh 0.9.1 (including) 0.9.6 (including)
Libssh Libssh 0.10.0 (including) 0.10.4 (including)
Red Hat Enterprise Linux 8 RedHat libssh-0:0.9.6-10.el8_8 *
Red Hat Enterprise Linux 8 RedHat libssh-0:0.9.6-10.el8_8 *
Red Hat Enterprise Linux 8.6 Extended Update Support RedHat libssh-0:0.9.6-4.el8_6 *
Red Hat Enterprise Linux 9 RedHat libssh-0:0.10.4-11.el9 *
Red Hat Enterprise Linux 9 RedHat libssh-0:0.10.4-11.el9 *
Libssh Ubuntu bionic *
Libssh Ubuntu devel *
Libssh Ubuntu esm-infra/xenial *
Libssh Ubuntu focal *
Libssh Ubuntu jammy *
Libssh Ubuntu kinetic *
Libssh Ubuntu lunar *
Libssh Ubuntu mantic *
Libssh Ubuntu noble *
Libssh Ubuntu oracular *
Libssh Ubuntu trusty *
Libssh Ubuntu upstream *
Libssh Ubuntu xenial *

Potential Mitigations

References