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USN-6857-1: Squid vulnerabilities

27 June 2024

Several security issues were fixed in Squid.

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Releases

Packages

  • squid3 - Web proxy cache server

Details

Joshua Rogers discovered that Squid incorrectly handled requests with the
urn: scheme. A remote attacker could possibly use this issue to cause
Squid to consume resources, leading to a denial of service. This issue
only affected Ubuntu 16.04 LTS. (CVE-2021-28651)

It was discovered that Squid incorrectly handled SSPI and SMB
authentication. A remote attacker could use this issue to cause Squid to
crash, resulting in a denial of service, or possibly obtain sensitive
information. This issue only affected Ubuntu 16.04 LTS. (CVE-2022-41318)

Joshua Rogers discovered that Squid incorrectly handled HTTP message
processing. A remote attacker could possibly use this issue to cause
Squid to crash, resulting in a denial of service. (CVE-2023-49285)

Joshua Rogers discovered that Squid incorrectly handled Helper process
management. A remote attacker could possibly use this issue to cause
Squid to crash, resulting in a denial of service. (CVE-2023-49286)

Joshua Rogers discovered that Squid incorrectly handled HTTP request
parsing. A remote attacker could possibly use this issue to cause
Squid to crash, resulting in a denial of service.
(CVE-2023-50269, CVE-2024-25617)

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

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

Ubuntu 18.04
Ubuntu 16.04

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

References

Related notices

  • USN-6594-1: squid, squid-common, squid-openssl, squidclient, squid-cgi, squid-purge
  • USN-6728-1: squid, squid-common, squid-openssl, squidclient, squid-cgi, squid-purge
  • USN-4981-1: squid, squid-common, squidclient, squid-cgi, squid-purge, squid3
  • USN-5641-1: squid, squid-common, squid-openssl, squidclient, squid-cgi, squid-purge, squid3

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Further reading