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Ubuntu: Security Advisory for gnupg2 (USN-4516-1)
Information
Severity
Severity
Medium
Family
Family
Ubuntu Local Security Checks
CVSSv2 Base
CVSSv2 Base
5.0
CVSSv2 Vector
CVSSv2 Vector
AV:N/AC:L/Au:N/C:P/I:N/A:N
Solution Type
Solution Type
Vendor Patch
Created
Created
3 years ago
Modified
Modified
3 years ago
Summary
The remote host is missing an update for the 'gnupg2' package(s) announced via the USN-4516-1 advisory.
Insight
Insight
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.
Affected Software
Affected Software
'gnupg2' package(s) on Ubuntu 18.04 LTS.
Detection Method
Detection Method
Checks if a vulnerable package version is present on the target host.
Solution
Solution
Please install the updated package(s).