CVE-2019-12527

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.

• CWE-787

• http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00053.htmlBroken Link
• http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00056.htmlBroken Link
• http://www.securityfocus.com/bid/109143Broken Link, Third Party Advisory, VDB Entry
• http://www.squid-cache.org/Versions/v4/changesets/Vendor Advisory
• http://www.squid-cache.org/Versions/v4/changesets/squid-4-7f73e9c5d17664b882ed32590e6af310c247f320.patchPatch, Vendor Advisory
• https://access.redhat.com/errata/RHSA-2019:2593Third Party Advisory
• https://github.com/squid-cache/squid/commits/v4Patch, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPXN2CLAGN5QSQBTOV5IGVLDOQSRFNTZ/
• https://seclists.org/bugtraq/2019/Aug/42Mailing List, Third Party Advisory
• https://usn.ubuntu.com/4065-1/Third Party Advisory
• https://www.debian.org/security/2019/dsa-4507Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00053.htmlBroken Link
• http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00056.htmlBroken Link
• http://www.securityfocus.com/bid/109143Broken Link, Third Party Advisory, VDB Entry
• http://www.squid-cache.org/Versions/v4/changesets/Vendor Advisory
• http://www.squid-cache.org/Versions/v4/changesets/squid-4-7f73e9c5d17664b882ed32590e6af310c247f320.patchPatch, Vendor Advisory
• https://access.redhat.com/errata/RHSA-2019:2593Third Party Advisory
• https://github.com/squid-cache/squid/commits/v4Patch, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPXN2CLAGN5QSQBTOV5IGVLDOQSRFNTZ/
• https://seclists.org/bugtraq/2019/Aug/42Mailing List, Third Party Advisory
• https://usn.ubuntu.com/4065-1/Third Party Advisory
• https://www.debian.org/security/2019/dsa-4507Third Party Advisory

Published

Jul 11, 2019

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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• CVE-2019-12522An issue was discovered in Squid through 4.7. When Squid is …4.5
• CVE-2019-12523An issue was discovered in Squid before 4.9. When handling a…9.1
• CVE-2019-12524An issue was discovered in Squid through 4.7. When handling …9.8
• CVE-2019-12525An issue was discovered in Squid 3.3.9 through 3.5.28 and 4.…9.8
• CVE-2019-12526An issue was discovered in Squid before 4.9. URN response ha…9.8
• CVE-2019-12528An issue was discovered in Squid before 4.10. It allows a cr…7.5
• CVE-2019-12529An issue was discovered in Squid 2.x through 2.7.STABLE9, 3.…5.9
• CVE-2019-1253An elevation of privilege vulnerability exists when the Wind…7.8
• CVE-2019-12530Incorrect access control was discovered in the stdonato Dash…
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