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Ubuntu 22.04 LTS USN-5745-1 Moderate: Shadow File Overwrite

ubuntu
Calendar Grey November 28, 2022
Dist Ubuntu Esm H88
Ubuntu Security Notice USN-5746-1 outlines a vulnerability in the kernel that could permit unauthorized privilege escalation.
shadow could be made to overwrite files.

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.

Topics%20covered

Topics Covered

security advisory file overwrite Ubuntu moderate threat shadow

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

Severity
medium
Lowest
Low
Medium
High
Critical

November 28, 2022

Topics%20covered

Topics Covered

security advisory file overwrite Ubuntu moderate threat shadow

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

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