medium
6.1
CWE
352
Advisory Published
Updated

CVE-2019-18677: CSRF

First published: Tue Nov 26 2019(Updated: )

An issue was discovered in Squid 3.x and 4.x through 4.8 when the append_domain setting is used (because the appended characters do not properly interact with hostname length restrictions). Due to incorrect message processing, it can inappropriately redirect traffic to origins it should not be delivered to.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Squid-Cache Squid>=2.0<=2.7
Squid-Cache Squid>=3.0<=3.5.28
Squid-Cache Squid>=4.0<=4.8
Squid-Cache Squid=2.7-stable2
Squid-Cache Squid=2.7-stable3
Squid-Cache Squid=2.7-stable4
Squid-Cache Squid=2.7-stable5
Squid-Cache Squid=2.7-stable6
Squid-Cache Squid=2.7-stable7
Squid-Cache Squid=2.7-stable8
Squid-Cache Squid=2.7-stable9
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=19.04
Canonical Ubuntu Linux=19.10
Fedoraproject Fedora=30
Fedoraproject Fedora=31
ubuntu/squid<4.4-1ubuntu2.3
4.4-1ubuntu2.3
ubuntu/squid<4.8-1ubuntu2.1
4.8-1ubuntu2.1
ubuntu/squid<4.9-2ubuntu1
4.9-2ubuntu1
ubuntu/squid<4.9-2ubuntu1
4.9-2ubuntu1
ubuntu/squid<4.9-2ubuntu1
4.9-2ubuntu1
ubuntu/squid<4.9-1
4.9-1
ubuntu/squid3<3.5.27-1ubuntu1.4
3.5.27-1ubuntu1.4
ubuntu/squid3<3.5.12-1ubuntu7.9
3.5.12-1ubuntu7.9
debian/squid
4.6-1+deb10u7
4.6-1+deb10u10
4.13-10+deb11u2
4.13-10+deb11u3
5.7-2
5.7-2+deb12u1
6.6-1
6.9-1

Remedy

https://github.com/squid-cache/squid/pull/427

Remedy

http://www.squid-cache.org/Versions/v4/changesets/squid-4-36492033ea4097821a4f7ff3ddcb971fbd1e8ba0.patch

Remedy

http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-e5f1813a674848dde570f7920873e1071f96e0b4.patch

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the vulnerability ID?

    The vulnerability ID is CVE-2019-18677.

  • What is the severity of CVE-2019-18677?

    The severity of CVE-2019-18677 is medium.

  • What is the affected software?

    The affected software is Squid 3.x and 4.x through 4.8.

  • How does the vulnerability CVE-2019-18677 impact the affected software?

    The vulnerability CVE-2019-18677 can inappropriately redirect traffic to origins it should not be delivered to due to incorrect message processing.

  • Is there a fix available for CVE-2019-18677?

    Yes, a fix is available for CVE-2019-18677. Users should update to version 4.9-2ubuntu1 or later for Ubuntu, or apply the appropriate patches for other affected systems.

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