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Integer Overflow or Wraparound Affecting libssh2 package, versions <0:1.4.3-12.amzn2.2.3

0.0
medium

Snyk CVSS

    Attack Complexity Low
    User Interaction Required
    Confidentiality High

    Threat Intelligence

    EPSS 0.41% (74th percentile)
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NVD
8.1 high
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SUSE
5.4 medium
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Red Hat
6.5 medium

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  • Snyk ID SNYK-AMZN2-LIBSSH2-1687749
  • published 27 Sep 2021
  • disclosed 21 Oct 2019
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Introduced: 21 Oct 2019

CVE-2019-17498 Open this link in a new tab
CWE-190 Open this link in a new tab

How to fix?

Upgrade Amazon-Linux:2 libssh2 to version 0:1.4.3-12.amzn2.2.3 or higher.
This issue was patched in ALAS2-2020-1531.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libssh2 package and not the libssh2 package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

In libssh2 v1.9.0 and earlier versions, the SSH_MSG_DISCONNECT logic in packet.c has an integer overflow in a bounds check, enabling an attacker to specify an arbitrary (out-of-bounds) offset for a subsequent memory read. A crafted SSH server may be able to disclose sensitive information or cause a denial of service condition on the client system when a user connects to the server.

References