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Ubuntu Security Notice USN-4477-1

Ubuntu Security Notice USN-4477-1
Posted Aug 27, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4477-1 - Amit Klein discovered that Squid incorrectly validated certain data. A remote attacker could possibly use this issue to perform an HTTP request smuggling attack, resulting in cache poisoning. Régis Leroy discovered that Squid incorrectly validated certain data. A remote attacker could possibly use this issue to perform an HTTP request splitting attack, resulting in cache poisoning. Lubos Uhliarik discovered that Squid incorrectly handled certain Cache Digest response messages sent by trusted peers. A remote attacker could possibly use this issue to cause Squid to consume resources, resulting in a denial of service. Various other issues were also addressed.

tags | advisory, remote, web, denial of service
systems | linux, ubuntu
advisories | CVE-2020-15810, CVE-2020-15811, CVE-2020-24606
MD5 | 44c77ca040383d52dd8b135b79c2c848

Ubuntu Security Notice USN-4477-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-4477-1
August 27, 2020

squid vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS

Summary:

Several security issues were fixed in Squid.

Software Description:
- squid: Web proxy cache server

Details:

Amit Klein discovered that Squid incorrectly validated certain data. A
remote attacker could possibly use this issue to perform an HTTP request
smuggling attack, resulting in cache poisoning. (CVE-2020-15810)

Régis Leroy discovered that Squid incorrectly validated certain data. A
remote attacker could possibly use this issue to perform an HTTP request
splitting attack, resulting in cache poisoning. (CVE-2020-15811)

Lubos Uhliarik discovered that Squid incorrectly handled certain Cache
Digest response messages sent by trusted peers. A remote attacker could
possibly use this issue to cause Squid to consume resources, resulting in a
denial of service. (CVE-2020-24606)

Update instructions:

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

Ubuntu 20.04 LTS:
squid 4.10-1ubuntu1.2

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

References:
https://usn.ubuntu.com/4477-1
CVE-2020-15810, CVE-2020-15811, CVE-2020-24606

Package Information:
https://launchpad.net/ubuntu/+source/squid/4.10-1ubuntu1.2
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