NULL Pointer Dereference Affecting libssh package, versions <0:0.9.4-2.el8


Severity

Recommended
0.0
medium
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.28% (69th percentile)

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  • Snyk IDSNYK-CENTOS8-LIBSSH-2075610
  • published26 Jul 2021
  • disclosed9 Apr 2020

Introduced: 9 Apr 2020

CVE-2020-1730  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade Centos:8 libssh to version 0:0.9.4-2.el8 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libssh package and not the libssh package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

A flaw was found in libssh versions before 0.8.9 and before 0.9.4 in the way it handled AES-CTR (or DES ciphers if enabled) ciphers. The server or client could crash when the connection hasn't been fully initialized and the system tries to cleanup the ciphers when closing the connection. The biggest threat from this vulnerability is system availability.

CVSS Base Scores

version 3.1