CVE-2019-12529

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 isnt 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.

Risk Information

Base Score

5.9

MODERATE

Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Score

Exploitation Probability

16.208

Associated Vulnerability

Vulnerability	OS Platform
Web proxy cache server (USN-4065-1) squid_4.4-1ubuntu2.2_i386.deb	Linux
Web proxy cache server (USN-4065-1) squid_4.4-1ubuntu2.2_amd64.deb	Linux
Web proxy cache server (USN-4065-1) squid3_3.5.12-1ubuntu7.8_all.deb	Linux
Web proxy cache server (USN-4065-1) squid3_3.5.27-1ubuntu1.3_all.deb	Linux
squid security update(DSA-4507-1) squid_4.6-1+deb10u1_amd64.deb	Linux
(RHSA-2020:4743) squid:4 security, bug fix, and enhancement update squid-4.11-3.module+el8.3.0+7851+7808b5f9.x86_64.rpm	Linux
(RHSA-2020:4743) squid:4 security, bug fix, and enhancement update squid-debugsource-4.11-3.module+el8.3.0+7851+7808b5f9.x86_64.rpm	Linux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234