CVE-2019-12529 Information disclosure in n/a

What is CVE-2019-12529?

CVE-2019-12529 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 11 Jul 2019. 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 2.x through 2.7.STABLE9, 3.x through 3.5.28, and 4.x through 4.7. When Squid is configured to use Basic Authentication, the Proxy-Authorization header is parsed via uudecode. uudecode determines how many bytes will be decoded by iterating over the input and checking its table. The length is then used to start decoding the string. There are no checks to ensure that the length it calculates isn't greater than the input buffer. This leads to adjacent memory being decoded as well. An attacker would not be able to retrieve the decoded data unless the Squid maintainer had configured the display of usernames on error pages.

Weakness: CWE-125

Which versions are affected by CVE-2019-12529?

It affects 5 products.

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

How do I fix CVE-2019-12529?

Upgrade to a fixed version.

Is CVE-2019-12529 being exploited?

There is no known exploitation of CVE-2019-12529 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-2019-12529, DEBIAN-CVE-2019-12529, GHSA-99gm-2796-7c8p, UBUNTU-CVE-2019-12529.