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AUSCERT External Security Bulletin Redistribution
ESB-2020.3333
USN-4551-1: Squid vulnerabilities
29 September 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Squid
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Denial of Service -- Remote/Unauthenticated
Provide Misleading Information -- Existing Account
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-24606 CVE-2020-15811 CVE-2020-15810
CVE-2020-15049
Reference: ESB-2020.3044
ESB-2020.3033
ESB-2020.3013
ESB-2020.2964
ESB-2020.2886
Original Bulletin:
https://usn.ubuntu.com/4551-1/
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USN-4551-1: Squid vulnerabilities
28 September 2020
Several security issues were fixed in Squid.
Releases
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Packages
o 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. (CVE-2020-15049)
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)
Regis 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 18.04
o squid - 3.5.27-1ubuntu1.9
Ubuntu 16.04
o squid - 3.5.12-1ubuntu7.15
In general, a standard system update will make all the necessary changes.
References
o CVE-2020-15049
o CVE-2020-15810
o CVE-2020-15811
o CVE-2020-24606
Related notices
o USN-4477-1 : squid
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