critical
9.8
CWE
190
Advisory Published
Updated

CVE-2020-11945: Integer Overflow

First published: Thu Apr 23 2020(Updated: )

An issue was discovered in Squid before 5.0.2. A remote attacker can replay a sniffed Digest Authentication nonce to gain access to resources that are otherwise forbidden. This occurs because the attacker can overflow the nonce reference counter (a short integer). Remote code execution may occur if the pooled token credentials are freed (instead of replayed as valid credentials).

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

Affected SoftwareAffected VersionHow to fix
Squid-Cache Squid>=3.0<=3.5.28
Squid-Cache Squid>=4.0<4.11
Squid-Cache Squid>=5.0<5.0.2
Debian Debian Linux=9.0
Debian Debian Linux=10.0
openSUSE Leap=15.1
Fedoraproject Fedora=30
Fedoraproject Fedora=31
Fedoraproject Fedora=32
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=19.10
Canonical Ubuntu Linux=20.04
debian/squid
4.13-10+deb11u3
5.7-2+deb12u2
6.10-1

Remedy

http://www.squid-cache.org/Versions/v4/changesets/squid-4-eeebf0f37a72a2de08348e85ae34b02c34e9a811.patch

Remedy

https://github.com/squid-cache/squid/commit/eeebf0f37a72a2de08348e85ae34b02c34e9a811

Remedy

https://github.com/squid-cache/squid/pull/585

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 CVE-2020-11945?

    CVE-2020-11945 is a vulnerability discovered in Squid versions before 5.0.2 that allows a remote attacker to gain unauthorized access to resources by replaying a sniffed Digest Authentication nonce.

  • What is the severity of CVE-2020-11945?

    CVE-2020-11945 has a severity level of critical with a CVSS score of 9.8.

  • How can an attacker exploit CVE-2020-11945?

    An attacker can exploit CVE-2020-11945 by overflowing the nonce reference counter, potentially leading to remote code execution.

  • Which versions of Squid are affected by CVE-2020-11945?

    Squid versions before 5.0.2 are affected by CVE-2020-11945.

  • How can I fix CVE-2020-11945?

    To fix CVE-2020-11945, you should update Squid to version 5.0.2 or later.

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