CVE-2019-12527

HIGH

Squid 4.0.23-4.7 - Heap-Based Buffer Overflow via Basic Authentication Header

Title source: llm
STIX 2.1

Description

An issue was discovered in Squid 4.0.23 through 4.7. When checking Basic Authentication with HttpHeader::getAuth, Squid uses a global buffer to store the decoded data. Squid does not check that the decoded length isn't greater than the buffer, leading to a heap-based buffer overflow with user controlled data.

References (11)

Core 11
Core References
Vendor Advisory x_refsource_confirm
http://www.squid-cache.org/Versions/v4/changesets/
Patch, Third Party Advisory x_refsource_confirm
https://github.com/squid-cache/squid/commits/v4
Broken Link, Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/109143
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4065-1/
Third Party Advisory vendor-advisory x_refsource_debian
https://www.debian.org/security/2019/dsa-4507
Mailing List, Third Party Advisory mailing-list x_refsource_bugtraq
https://seclists.org/bugtraq/2019/Aug/42
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2019:2593

Scores

CVSS v3 8.8
EPSS 0.1216
EPSS Percentile 93.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Details

CWE
CWE-787
Status published
Products (17)
canonical/ubuntu_linux 16.04
canonical/ubuntu_linux 18.04
canonical/ubuntu_linux 19.04
debian/debian_linux 10.0
fedoraproject/fedora 29
redhat/enterprise_linux 8.0
redhat/enterprise_linux_eus 8.1
redhat/enterprise_linux_eus 8.2
redhat/enterprise_linux_eus 8.4
redhat/enterprise_linux_eus 8.6
... and 7 more
Published Jul 11, 2019
Tracked Since Feb 18, 2026