Out-of-bounds Write Affecting libssh2 package, versions <1.8.1-r0


0.0
high

Snyk CVSS

    Attack Complexity Low
    User Interaction Required
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.33% (71st percentile)
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NVD
8.8 high
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SUSE
3.5 low
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Red Hat
7.5 high

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  • Snyk ID SNYK-ALPINE39-LIBSSH2-467504
  • published 22 Sep 2019
  • disclosed 22 Sep 2019
  • credit Unknown

How to fix?

Upgrade Alpine:3.9 libssh2 to version 1.8.1-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libssh2 package and not the libssh2 package as distributed by Alpine. See How to fix? for Alpine:3.9 relevant fixed versions and status.

An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.