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NULL Pointer Dereference Affecting libssh package, versions <0.9.0-1ubuntu1.4

0.0
medium

Snyk CVSS

    Attack Complexity Low

    Threat Intelligence

    EPSS 0.42% (75th percentile)
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NVD
5.3 medium
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SUSE
5.3 medium
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Red Hat
5.3 medium

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  • Snyk ID SNYK-UBUNTU1910-LIBSSH-580029
  • published 9 Apr 2020
  • disclosed 13 Apr 2020
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Introduced: 9 Apr 2020

CVE-2020-1730 Open this link in a new tab
CWE-476 Open this link in a new tab

How to fix?

Upgrade Ubuntu:19.10 libssh to version 0.9.0-1ubuntu1.4 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 Ubuntu. See How to fix? for Ubuntu:19.10 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.

References