CVE-2020-11945 Integer overflow in n/a

What is CVE-2020-11945?

CVE-2020-11945 is a critical vulnerability in Canonical Ubuntu Linux, published on 23 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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).

Weakness: CWE-190

Which versions are affected by CVE-2020-11945?

It affects 5 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Opensuse Leap, Squid-Cache Squid.

How do I fix CVE-2020-11945?

Upgrade to a fixed version.

Is CVE-2020-11945 being exploited?

There is no known exploitation of CVE-2020-11945 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2020-11945, DEBIAN-CVE-2020-11945, GHSA-82gh-fr9f-867h, MGASA-2020-0187, UBUNTU-CVE-2020-11945.