Information Exposure Affecting libgcrypt20 package, versions <1.8.1-4ubuntu1.3


Severity

Recommended
low

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.19% (57th percentile)

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  • Snyk IDSNYK-UBUNTU1804-LIBGCRYPT20-1297920
  • published1 Jun 2021
  • disclosed8 Jun 2021

Introduced: 1 Jun 2021

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

How to fix?

Upgrade Ubuntu:18.04 libgcrypt20 to version 1.8.1-4ubuntu1.3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libgcrypt20 package and not the libgcrypt20 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 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