Vulnerability DatabaseCVE-2019-12527
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CVE-2019-12527
Published:July 11, 2019
Updated:May 17, 2026
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.
Related Resources (15)
https://www.debian.org/security/2019/dsa-4507
https://github.com/squid-cache/squid/commits/v4
https://seclists.org/bugtraq/2019/Aug/42
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SPXN2CLAGN5QSQBTOV5IGVLDOQSRFNTZ/
https://access.redhat.com/errata/RHSA-2019:2593
http://www.squid-cache.org/Versions/v4/changesets/
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00056.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPXN2CLAGN5QSQBTOV5IGVLDOQSRFNTZ/
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00053.html
https://access.redhat.com/security/cve/CVE-2019-12527
https://people.canonical.com/~ubuntu-security/cve/CVE-2019-12527
https://security-tracker.debian.org/tracker/CVE-2019-12527
https://usn.ubuntu.com/4065-1/
http://www.securityfocus.com/bid/109143
http://www.squid-cache.org/Versions/v4/changesets/squid-4-7f73e9c5d17664b882ed32590e6af310c247f320.patch
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Out-of-bounds Write
CWE-787
EPSS
Base Score:
12.16