A Libgcrypt security update has been released for Ubuntu Linux 18.04 LTS, 20.04 LTS, and 21.04.
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Ubuntu Security Notice USN-5080-1
September 16, 2021
libgcrypt20 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 21.04
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
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.
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
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
