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.
Published: 2019-07-11
Score: 5.9 Medium
EPSS: 16.2% Moderate
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-1858-1 squid3 security update
Debian DLA Debian DLA DLA-2278-1 squid3 security update
Debian DLA Debian DLA DLA-2278-2 squid3 regression update
Debian DLA Debian DLA DLA-2278-3 squid3 regression update
Debian DSA Debian DSA DSA-4507-1 squid security update
EUVD EUVD EUVD-2019-4124 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.
Ubuntu USN Ubuntu USN USN-4065-1 Squid vulnerabilities
Ubuntu USN Ubuntu USN USN-4065-2 Squid vulnerabilities
History

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Subscriptions

Canonical Ubuntu Linux
Debian Debian Linux
Fedoraproject Fedora
Opensuse Leap
Redhat Enterprise Linux
Squid-cache Squid
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-04T23:24:38.470Z

Reserved: 2019-06-02T00:00:00.000Z

Link: CVE-2019-12529

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2019-07-11T19:15:13.157

Modified: 2024-11-21T04:23:02.987

Link: CVE-2019-12529

cve-icon Redhat

Severity : Moderate

Publid Date: 2019-07-11T00:00:00Z

Links: CVE-2019-12529 - Bugzilla

cve-icon OpenCVE Enrichment

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Weaknesses