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Ubuntu 18.04 LTS USN-4516-1 Critical: GnuPG Information Exposure

ubuntu
Calendar Grey September 17, 2020
Dist Ubuntu Esm H88
GnuPG may reveal confidential data. Safeguard your Ubuntu 18.04 LTS installation by applying the latest updates to mitigate this risk.
GnuPG could be made to expose sensitive information.

Summary

GnuPG could be made to expose sensitive information.

Software Description:

- gnupg2: GNU privacy guard - a free PGP replacement

Details:

It was discovered that GnuPG signatures could be forged when the SHA-1

algorithm is being used. This update removes validating signatures based on

SHA-1 that were generated after 2019-01-19. In environments where this is

still required, a new option --allow-weak-key-signatures can be used to

revert this behaviour.

Topics%20covered

Topics Covered

security advisory gnupg information exposure ubuntu 2019-01-19

Update Instructions

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

Ubuntu 18.04 LTS:
  gnupg                           2.2.4-1ubuntu1.3

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

References

https://ubuntu.com/security/notices/USN-4516-1

CVE-2019-14855

Severity
critical
Lowest
Low
Medium
High
Critical

September 17, 2020

Topics%20covered

Topics Covered

security advisory gnupg information exposure ubuntu 2019-01-19

Package Information

https://launchpad.net/ubuntu/+source/gnupg2/2.2.4-1ubuntu1.3

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