A Git security update has been released for Ubuntu Linux 16.04 LTS, 18.04 LTS, 20.04 LTS, and 20.10.
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Ubuntu Security Notice USN-4761-1
March 09, 2021
git vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary:
Git could be made to run programs if it received specially crafted network
traffic.
Software Description:
- git: fast, scalable, distributed revision control system
Details:
Matheus Tavares discovered that Git incorrectly handled delay-capable
clean/smudge filters when being used on case-insensitive filesystems. A
remote attacker could possibly use this issue to execute arbitrary code.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 20.10:
git 1:2.27.0-1ubuntu1.1
Ubuntu 20.04 LTS:
git 1:2.25.1-1ubuntu3.1
Ubuntu 18.04 LTS:
git 1:2.17.1-1ubuntu0.8
Ubuntu 16.04 LTS:
git 1:2.7.4-0ubuntu1.10
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-4761-1
CVE-2021-21300
Package Information:
https://launchpad.net/ubuntu/+source/git/1:2.27.0-1ubuntu1.1
https://launchpad.net/ubuntu/+source/git/1:2.25.1-1ubuntu3.1
https://launchpad.net/ubuntu/+source/git/1:2.17.1-1ubuntu0.8
https://launchpad.net/ubuntu/+source/git/1:2.7.4-0ubuntu1.10
