What’s Vulnerable › Vulnerabilities
CVE-2019-12527
- Severity: high (CVSS 8.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 49.0% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2019-07-11 · updated 2026-06-17
- Weakness: CWE-787
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.
Affected products
- Canonical Ubuntu Linux: 16.04, 18.04, 19.04
- Debian Linux: 10.0
- Fedoraproject Fedora: 29
- Red Hat Enterprise Linux: 8.0
- RedHat Enterprise Linux Eus: 8.1, 8.2, 8.4, 8.6
- RedHat Enterprise Linux Server Aus: 8.2, 8.4, 8.6
- RedHat Enterprise Linux Server Tus: 8.2, 8.4, 8.6
- Squid: from 4.0.23 through 4.7
References
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00053.html
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00056.html
- http://www.securityfocus.com/bid/109143
- http://www.squid-cache.org/Versions/v4/changesets/
- http://www.squid-cache.org/Versions/v4/changesets/squid-4-7f73e9c5d17664b882ed32590e6af310c247f320.patch
- https://access.redhat.com/errata/RHSA-2019:2593
- https://github.com/squid-cache/squid/commits/v4
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPXN2CLAGN5QSQBTOV5IGVLDOQSRFNTZ/
- https://seclists.org/bugtraq/2019/Aug/42
- https://usn.ubuntu.com/4065-1/
- https://www.debian.org/security/2019/dsa-4507
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00053.html
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