CWE
444
Advisory Published
CVE Published
Updated

CVE-2021-36740

First published: Tue Jul 13 2021(Updated: )

Varnish Cache, with HTTP/2 enabled, allows request smuggling and VCL authorization bypass via a large Content-Length header for a POST request. This affects Varnish Enterprise 6.0.x before 6.0.8r3, and Varnish Cache 5.x and 6.x before 6.5.2, 6.6.x before 6.6.1, and 6.0 LTS before 6.0.8.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
debian/varnish
6.1.1-1+deb10u3
6.1.1-1+deb10u4
6.5.1-1+deb11u3
7.1.1-1.1
Varnish-cache Varnish Cache>=6.0.0<6.0.8
Varnish-cache Varnish Cache=6.0.8-r1
Varnish-cache Varnish Cache=6.0.8-r2
Varnish-software Varnish Cache>=6.0.0<=6.0.5
Varnish-software Varnish Cache>=6.0.0<=6.0.7
Varnish Cache Project Varnish Cache>=5.0.0<=5.2.1
Varnish Cache Project Varnish Cache>=6.1.0<=6.6.0
Fedoraproject Fedora=33
Fedoraproject Fedora=34
Debian Debian Linux=10.0
Debian Debian Linux=11.0

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.

Frequently Asked Questions

  • What is the vulnerability ID for this vulnerability?

    The vulnerability ID is CVE-2021-36740.

  • What is the severity of CVE-2021-36740?

    The severity of CVE-2021-36740 is medium (6.5).

  • Which software versions are affected by CVE-2021-36740?

    Varnish Enterprise 6.0.x before 6.0.8r3, Varnish Cache 5.x and 6.x before 6.5.2, 6.6.x before 6.6.1, and 6.0 LTS before 6.0.8 are affected by CVE-2021-36740.

  • How can I fix CVE-2021-36740?

    To fix CVE-2021-36740, you should update Varnish Cache to version 6.5.2, 6.6.1, or 6.0.8, depending on the software version you are using.

  • Where can I find more information about CVE-2021-36740?

    You can find more information about CVE-2021-36740 on the Varnish Software website and the GitHub page of Varnish Cache.

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.
© 2024 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203