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AUSCERT External Security Bulletin Redistribution
USN-4895-1: Squid vulnerabilities
30 March 2021
AusCERT Security Bulletin Summary
Operating System: Ubuntu
Impact/Access: Provide Misleading Information -- Existing Account
Access Confidential Data -- Existing Account
Unauthorised Access -- Existing Account
CVE Names: CVE-2020-25097 CVE-2020-15049
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USN-4895-1: Squid vulnerabilities
29 March 2021
Several security issues were fixed in Squid.
o Ubuntu 20.10
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
o squid - Web proxy cache server
o squid3 - Web proxy cache server
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 )
The problem can be corrected by updating your system to the following package
o squid - 4.13-1ubuntu2.1
o squid - 4.10-1ubuntu1.3
o squid - 3.5.27-1ubuntu1.10
o squid - 3.5.12-1ubuntu7.16
In general, a standard system update will make all the necessary changes.
o USN-4551-1 : squid3, squid
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