==========================================================================
Ubuntu Security Notice USN-4213-1
December 04, 2019
squid, squid3 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 19.10
– Ubuntu 19.04
– Ubuntu 18.04 LTS
– Ubuntu 16.04 LTS
Summary:
Several security issues were fixed in Squid.
Software Description:
– squid: Web proxy cache server
– squid3: Web proxy cache server
Details:
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 and access restricted servers. This issue was
only addressed in Ubuntu 19.04 and Ubuntu 19.10. (CVE-2019-12523)
Jeriko One discovered that Squid incorrectly handed URN responses. A remote
attacker could use this issue to cause Squid to crash, resulting in a
denial of service, or possibly execute arbitrary code. (CVE-2019-12526)
Alex Rousskov discovered that Squid incorrectly handled certain strings. A
remote attacker could possibly use this issue to cause Squid to crash,
resulting in a denial of service. This issue only affected Ubuntu 19.04.
(CVE-2019-12854)
Jeriko One and Kristoffer Danielsson discovered that Squid incorrectly
handled certain input. A remote attacker could use this issue to cause
Squid to crash, resulting in a denial of service, or possibly execute
arbitrary code. This issue was only addressed in Ubuntu 19.04 and Ubuntu
19.10. (CVE-2019-18676)
Kristoffer Danielsson discovered that Squid incorrectly handled certain
messages. This issue could result in traffic being redirected to origins
it should not be delivered to. (CVE-2019-18677)
Régis Leroy discovered that Squid incorrectly handled certain HTTP
request headers. A remote attacker could use this to smuggle HTTP requests
and corrupt caches with arbitrary content. (CVE-2019-18678)
David Fifield discovered that Squid incorrectly handled HTTP Digest
Authentication. A remote attacker could possibly use this issue to obtain
pointer contents and bypass ASLR protections. (CVE-2019-18679)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 19.10:
squid 4.8-1ubuntu2.1
Ubuntu 19.04:
squid 4.4-1ubuntu2.3
Ubuntu 18.04 LTS:
squid3 3.5.27-1ubuntu1.4
Ubuntu 16.04 LTS:
squid3 3.5.12-1ubuntu7.9
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/4213-1
CVE-2019-12523, CVE-2019-12526, CVE-2019-12854, CVE-2019-18676,
CVE-2019-18677, CVE-2019-18678, CVE-2019-18679
Package Information:
https://launchpad.net/ubuntu/+source/squid/4.8-1ubuntu2.1
https://launchpad.net/ubuntu/+source/squid/4.4-1ubuntu2.3
https://launchpad.net/ubuntu/+source/squid3/3.5.27-1ubuntu1.4
https://launchpad.net/ubuntu/+source/squid3/3.5.12-1ubuntu7.9
—–BEGIN PGP SIGNATURE—–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=JY37
—–END PGP SIGNATURE—–
—
