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Out-of-bounds Write Affecting libssh2 package, versions <0:1.4.3-12.amzn2.2

Severity

0.0
high
0
10

    Threat Intelligence

    EPSS
    0.52% (77th percentile)

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  • Snyk ID SNYK-AMZN2-LIBSSH2-1670013
  • published 27 Sep 2021
  • disclosed 25 Mar 2019
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Introduced: 25 Mar 2019

CVE-2019-3863 Open this link in a new tab
CWE-787 Open this link in a new tab

How to fix?

Upgrade Amazon-Linux:2 libssh2 to version 0:1.4.3-12.amzn2.2 or higher.
This issue was patched in ALAS2-2019-1199.

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.

A flaw was found in libssh2 before 1.8.1. A server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. This value is used as an index to copy memory causing in an out of bounds memory write error.

References

CVSS Scores

version 3.1
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Snyk

7.5 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    Required
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    High
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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