Information Exposure Affecting libgcrypt package, versions <0:1.8.5-6.el8


Severity

Recommended
medium

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.19% (57th percentile)

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  • Snyk IDSNYK-ROCKY8-LIBGCRYPT-3210313
  • published5 Jan 2023
  • disclosed8 Jun 2021

Introduced: 8 Jun 2021

CVE-2021-33560  (opens in a new tab)
CWE-203  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:8 libgcrypt to version 0:1.8.5-6.el8 or higher.
This issue was patched in RLSA-2021:4409.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libgcrypt package and not the libgcrypt package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:8 relevant fixed versions and status.

Libgcrypt before 1.8.8 and 1.9.x before 1.9.3 mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm, and the window size is not chosen appropriately. This, for example, affects use of ElGamal in OpenPGP.

CVSS Scores

version 3.1