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AUSCERT External Security Bulletin Redistribution
ESB-2020.1681
USN-4356-1: Squid vulnerabilities
14 May 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Squid
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-11945 CVE-2019-18860 CVE-2019-12521
CVE-2019-12519
Reference: ESB-2020.1604
ESB-2020.1420
Original Bulletin:
https://usn.ubuntu.com/4356-1/
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USN-4356-1: Squid vulnerabilities
13 May 2020
squid, squid3 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 20.04 LTS
o Ubuntu 19.10
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Summary
Several security issues were fixed in Squid.
Software Description
o squid - Web proxy cache server
o squid3 - Web proxy cache server
Details
Jeriko One discovered that Squid incorrectly handled certain Edge Side Includes
(ESI) responses. A malicious remote server could cause Squid to crash, possibly
poison the cache, or possibly execute arbitrary code. (CVE-2019-12519,
CVE-2019-12521)
It was discovered that Squid incorrectly handled the hostname parameter to
cachemgr.cgi when certain browsers are used. A remote attacker could possibly
use this issue to inject HTML or invalid characters in the hostname parameter.
This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 19.10.
(CVE-2019-18860)
ClA(C)ment Berthaux and Florian Guilbert discovered that Squid incorrectly
handled Digest Authentication nonce values. A remote attacker could use this
issue to replay nonce values, or possibly execute arbitrary code.
(CVE-2020-11945)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 20.04 LTS
squid - 4.10-1ubuntu1.1
Ubuntu 19.10
squid - 4.8-1ubuntu2.3
Ubuntu 18.04 LTS
squid - 3.5.27-1ubuntu1.6
Ubuntu 16.04 LTS
squid - 3.5.12-1ubuntu7.11
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .
In general, a standard system update will make all the necessary changes.
References
o CVE-2019-12519
o CVE-2019-12521
o CVE-2019-18860
o CVE-2020-11945
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