Packages
- squid3 - Web proxy cache server
Details
USN-4446-1 fixed vulnerabilities in Squid. The update introduced a
regression when using Squid with the icap or ecap protocols. This update
fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Jeriko One discovered that Squid incorrectly handled caching certain
requests. A remote attacker could possibly use this issue to perform
cache-injection attacks or gain access to reverse proxy features such as
ESI. (CVE-2019-12520)
Jeriko One and Kristoffer Danielsson discovered that Squid incorrectly
handled certain URN requests. A remote attacker could possibly use this
issue to bypass access checks. (CVE-2019-12523)
Jeriko One discovered that Squid incorrectly handled URL decoding. A remote
attacker could possibly use this issue to bypass certain rule checks.
(
USN-4446-1 fixed vulnerabilities in Squid. The update introduced a
regression when using Squid with the icap or ecap protocols. This update
fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Jeriko One discovered that Squid incorrectly handled caching certain
requests. A remote attacker could possibly use this issue to perform
cache-injection attacks or gain access to reverse proxy features such as
ESI. (CVE-2019-12520)
Jeriko One and Kristoffer Danielsson discovered that Squid incorrectly
handled certain URN requests. A remote attacker could possibly use this
issue to bypass access checks. (CVE-2019-12523)
Jeriko One discovered that Squid incorrectly handled URL decoding. A remote
attacker could possibly use this issue to bypass certain rule checks.
(CVE-2019-12524)
Jeriko One and Kristoffer Danielsson discovered that Squid incorrectly
handled input validation. A remote attacker could use this issue to cause
Squid to crash, resulting in a denial of service. (CVE-2019-18676)
Update instructions
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 18.04 LTS bionic | squid – 3.5.27-1ubuntu1.8 | ||
| 16.04 LTS xenial | squid – 3.5.12-1ubuntu7.13 | ||
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