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
debian/squid
4.13-10+deb11u3
5.7-2+deb12u2
6.12-1
Squid Web Proxy Cache>=2.0<=2.7
Squid Web Proxy Cache>=3.0<=3.5.28
Squid Web Proxy Cache>=4.0<=4.8
Squid Web Proxy Cache=2.7-stable2
Squid Web Proxy Cache=2.7-stable3
Squid Web Proxy Cache=2.7-stable4
Squid Web Proxy Cache=2.7-stable5
Squid Web Proxy Cache=2.7-stable6
Squid Web Proxy Cache=2.7-stable7
Squid Web Proxy Cache=2.7-stable8
Squid Web Proxy Cache=2.7-stable9
Ubuntu Linux=16.04
Ubuntu Linux=18.04
Ubuntu Linux=19.04
Ubuntu Linux=19.10
Fedoraproject Fedora=30
Fedoraproject Fedora=31

Remedy

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

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

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.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2025 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203