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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-LIBSSH2-467505
  • published 22 Sep 2019
  • disclosed 22 Sep 2019
  • credit Unknown
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Introduced: 22 Sep 2019

CVE-2019-3856 Open this link in a new tab
CWE-787 Open this link in a new tab
CWE-190 Open this link in a new tab

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 keyboard prompt requests 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.

References