Ubuntu 21.04: 5104-1 Moderate: Squid Denial Of Service Threat

ubuntu

October 5, 2021

Squid could be made to crash or expose sensitive information over the network.

Summary

Squid could be made to crash or expose sensitive information over the

network.

Software Description:

- squid: Web proxy cache server

- squid3: Web proxy cache server

Details:

Lyu discovered that Squid incorrectly handled WCCP protocol data. A remote

attacker could use this issue to cause Squid to crash, resulting in a

denial of service, or possibly obtain sensitive information.

Topics Covered

security advisory denial of service Ubuntu squid sensitive information

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 21.04:
  squid                           4.13-1ubuntu4.2

Ubuntu 20.04 LTS:
  squid                           4.10-1ubuntu1.5

Ubuntu 18.04 LTS:
  squid                           3.5.27-1ubuntu1.12

In general, a standard system update will make all the necessary changes.