Ubuntu Security Notice USN-5745-1
November 28, 2022
shadow vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 22.10
– Ubuntu 22.04 LTS
– Ubuntu 20.04 LTS
– Ubuntu 18.04 LTS
– Ubuntu 16.04 ESM
– Ubuntu 14.04 ESM
Summary:
shadow could be made to overwrite files.
Software Description:
– shadow: system login tools
Details:
Florian Weimer discovered that shadow was not properly copying and removing
user directory trees, which could lead to a race condition. A local attacker
could possibly use this issue to setup a symlink attack and alter or remove
directories without authorization.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 22.10:
libsubid4 1:4.11.1+dfsg1-2ubuntu1.1
login 1:4.11.1+dfsg1-2ubuntu1.1
passwd 1:4.11.1+dfsg1-2ubuntu1.1
uidmap 1:4.11.1+dfsg1-2ubuntu1.1
Ubuntu 22.04 LTS:
login 1:4.8.1-2ubuntu2.1
passwd 1:4.8.1-2ubuntu2.1
uidmap 1:4.8.1-2ubuntu2.1
Ubuntu 20.04 LTS:
login 1:4.8.1-1ubuntu5.20.04.3
passwd 1:4.8.1-1ubuntu5.20.04.3
uidmap 1:4.8.1-1ubuntu5.20.04.3
Ubuntu 18.04 LTS:
login 1:4.5-1ubuntu2.4
passwd 1:4.5-1ubuntu2.4
uidmap 1:4.5-1ubuntu2.4
Ubuntu 16.04 ESM:
login 1:4.2-3.1ubuntu5.5+esm2
passwd 1:4.2-3.1ubuntu5.5+esm2
uidmap 1:4.2-3.1ubuntu5.5+esm2
Ubuntu 14.04 ESM:
login 1:4.1.5.1-1ubuntu9.5+esm2
passwd 1:4.1.5.1-1ubuntu9.5+esm2
uidmap 1:4.1.5.1-1ubuntu9.5+esm2
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-5745-1
CVE-2013-4235
Package Information:
https://launchpad.net/ubuntu/+source/shadow/1:4.11.1+dfsg1-2ubuntu1.1
https://launchpad.net/ubuntu/+source/shadow/1:4.8.1-2ubuntu2.1
https://launchpad.net/ubuntu/+source/shadow/1:4.8.1-1ubuntu5.20.04.3
https://launchpad.net/ubuntu/+source/shadow/1:4.5-1ubuntu2.4
