Information Exposure Affecting libssh2 package, versions <0:1.4.2-2.13.amzn1


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.46% (76th percentile)

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  • Snyk IDSNYK-AMZN201803-LIBSSH2-1694756
  • published27 Sept 2021
  • disclosed13 Apr 2016

Introduced: 13 Apr 2016

CVE-2016-0787  (opens in a new tab)
CWE-200  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 libssh2 to version 0:1.4.2-2.13.amzn1 or higher.
This issue was patched in ALAS-2016-683.

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:2018.03 relevant fixed versions and status.

The diffie_hellman_sha256 function in kex.c in libssh2 before 1.7.0 improperly truncates secrets to 128 or 256 bits, which makes it easier for man-in-the-middle attackers to decrypt or intercept SSH sessions via unspecified vectors, aka a "bits/bytes confusion bug."

CVSS Scores

version 3.1