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Improper Authentication Affecting libssh2 package, versions *

0.0
medium

Snyk CVSS

    Attack Complexity High

    Threat Intelligence

    EPSS 0.14% (49th percentile)
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NVD
6.5 medium
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SUSE
4.8 medium
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Red Hat
4.8 medium

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  • Snyk ID SNYK-CENTOS7-LIBSSH2-5499625
  • published 8 May 2023
  • disclosed 5 May 2023
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Introduced: 5 May 2023

CVE-2023-2283 Open this link in a new tab
CWE-287 Open this link in a new tab

How to fix?

There is no fixed version for Centos:7 libssh2.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libssh2 package and not the libssh2 package as distributed by Centos. See How to fix? for Centos:7 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.