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Ubuntu 18.04/16.04 LTS: USN-4446-2 Moderate: Squid Regression Fix

ubuntu
Calendar Grey August 27, 2020
Dist Ubuntu Esm H88
Ubuntu Security Notice USN-4446-2 addresses a regression issue in Squid that impacts several versions, highlighting essential update information for users.
USN-4446-1 introduced a regression in Squid.

Summary

USN-4446-1 introduced a regression in Squid.

Software Description:

- squid3: Web proxy cache server

Details:

USN-4446-1 fixed vulnerabilities in Squid. The update introduced a

regression when using Squid with the icap or ecap protocols. This update

fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Jeriko One discovered that Squid incorrectly handled caching certain

requests. A remote attacker could possibly use this issue to perform

cache-injection attacks or gain access to reverse proxy features such as

ESI. (CVE-2019-12520)

Jeriko One and Kristoffer Danielsson discovered that Squid incorrectly

handled certain URN requests. A remote attacker could possibly use this

issue to bypass access checks. (CVE-2019-12523)

Jeriko One discovered that Squid incorrectly handled URL decoding. A remote

attacker could possibly use this issue to bypass certain rule checks.

(CVE-2019-12524)

Jeriko One and Kristoffer Daniel...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu squid regression access bypass cache injection

Update Instructions

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

Ubuntu 18.04 LTS:
  squid                           3.5.27-1ubuntu1.8

Ubuntu 16.04 LTS:
  squid                           3.5.12-1ubuntu7.13

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

References

https://ubuntu.com/security/notices/USN-4446-2

https://ubuntu.com/security/notices/USN-4446-1

https://bugs.launchpad.net/ubuntu/+source/squid3/+bug/1890265

August 27, 2020

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu squid regression access bypass cache injection

Package Information

https://launchpad.net/ubuntu/+source/squid3/3.5.27-1ubuntu1.8
https://launchpad.net/ubuntu/+source/squid3/3.5.12-1ubuntu7.13

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