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Ubuntu 21.04, 20.04 LTS, 18.04 LTS Security Advisory - Libgcrypt Exposure

ubuntu
Calendar Grey September 16, 2021
Dist Ubuntu Esm H88
Security flaws discovered in Libgcrypt for Ubuntu versions 21.04, 20.04 LTS, and 18.04 LTS. Ensure you install latest updates to mitigate potential threats.
Libgcrypt could be made to expose sensitive information.

Summary

Libgcrypt could be made to expose sensitive information.

Software Description:

- libgcrypt20: LGPL Crypto library

Details:

It was discovered that Libgcrypt incorrectly handled ElGamal encryption. An

attacker could possibly use this issue to recover sensitive information.

Topics%20covered

Topics Covered

security advisory update instructions software issue information exposure cryptography ubuntu libgcrypt

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 21.04:
  libgcrypt20                     1.8.7-2ubuntu2.1

Ubuntu 20.04 LTS:
  libgcrypt20                     1.8.5-5ubuntu1.1

Ubuntu 18.04 LTS:
  libgcrypt20                     1.8.1-4ubuntu1.3

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-5080-1

CVE-2021-33560, CVE-2021-40528

Severity
important
Lowest
Low
Medium
High
Critical

September 16, 2021

Topics%20covered

Topics Covered

security advisory update instructions software issue information exposure cryptography ubuntu libgcrypt

Package Information

https://launchpad.net/ubuntu/+source/libgcrypt20/1.8.7-2ubuntu2.1
https://launchpad.net/ubuntu/+source/libgcrypt20/1.8.5-5ubuntu1.1
https://launchpad.net/ubuntu/+source/libgcrypt20/1.8.1-4ubuntu1.3

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