Improper Authentication Affecting libssh-devel package, versions <0:0.10.4-11.el9


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.19% (57th percentile)

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  • Snyk IDSNYK-RHEL9-LIBSSHDEVEL-7874763
  • published3 Sept 2024
  • disclosed5 May 2023

Introduced: 5 May 2023

CVE-2023-2283  (opens in a new tab)
CWE-287  (opens in a new tab)

How to fix?

Upgrade RHEL:9 libssh-devel to version 0:0.10.4-11.el9 or higher.
This issue was patched in RHSA-2023:6643.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libssh-devel package and not the libssh-devel package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

A vulnerability was found in libssh, where the authentication check of the connecting client can be bypassed in thepki_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.

CVSS Scores

version 3.1