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Ubuntu Security Notice USN-4895-1

Ubuntu Security Notice USN-4895-1
Posted Mar 30, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4895-1 - Alex Rousskov and Amit Klein discovered that Squid incorrectly handled certain Content-Length headers. A remote attacker could possibly use this issue to perform an HTTP request smuggling attack, resulting in cache poisoning. This issue only affected Ubuntu 20.04 LTS. Jianjun Chen discovered that Squid incorrectly validated certain input. A remote attacker could use this issue to perform HTTP Request Smuggling and possibly access services forbidden by the security controls. Various other issues were also addressed.

tags | advisory, remote, web
systems | linux, ubuntu
advisories | CVE-2020-15049, CVE-2020-25097
MD5 | 1cebe622843beb614b653077f5a4fca8

Ubuntu Security Notice USN-4895-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-4895-1
March 29, 2021

squid, squid3 vulnerabilities
==========================================================================

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

- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Squid.

Software Description:
- squid: Web proxy cache server
- squid3: Web proxy cache server

Details:

Alex Rousskov and Amit Klein discovered that Squid incorrectly handled
certain Content-Length headers. A remote attacker could possibly use this
issue to perform an HTTP request smuggling attack, resulting in cache
poisoning. This issue only affected Ubuntu 20.04 LTS. (CVE-2020-15049)

Jianjun Chen discovered that Squid incorrectly validated certain input. A
remote attacker could use this issue to perform HTTP Request Smuggling and
possibly access services forbidden by the security controls.
(CVE-2020-25097)

Update instructions:

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

Ubuntu 20.10:
squid 4.13-1ubuntu2.1

Ubuntu 20.04 LTS:
squid 4.10-1ubuntu1.3

Ubuntu 18.04 LTS:
squid 3.5.27-1ubuntu1.10

Ubuntu 16.04 LTS:
squid 3.5.12-1ubuntu7.16

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

References:
https://ubuntu.com/security/notices/USN-4895-1
CVE-2020-15049, CVE-2020-25097

Package Information:
https://launchpad.net/ubuntu/+source/squid/4.13-1ubuntu2.1
https://launchpad.net/ubuntu/+source/squid/4.10-1ubuntu1.3
https://launchpad.net/ubuntu/+source/squid3/3.5.27-1ubuntu1.10
https://launchpad.net/ubuntu/+source/squid3/3.5.12-1ubuntu7.16
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