{"id":"CVE-2019-12527","details":"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.","modified":"2026-05-18T05:51:54.610288024Z","published":"2019-07-11T19:15:13.097Z","related":["ALSA-2019:2593","SUSE-SU-2019:2975-1","openSUSE-SU-2019:2540-1","openSUSE-SU-2019:2541-1","openSUSE-SU-2024:11403-1"],"database_specific":{"unresolved_ranges":[{"source":"CPE_FIELD","extracted_events":[{"last_affected":"16.04"},{"last_affected":"18.04"},{"last_affected":"19.04"}],"cpes":["cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*"],"vendor_product":"canonical:ubuntu_linux"},{"source":"CPE_FIELD","extracted_events":[{"last_affected":"10.0"}],"cpes":["cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*"],"vendor_product":"debian:debian_linux"},{"cpes":["cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"29"}],"source":"CPE_FIELD","vendor_product":"fedoraproject:fedora"},{"source":"CPE_FIELD","extracted_events":[{"last_affected":"8.0"}],"cpes":["cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*"],"vendor_product":"redhat:enterprise_linux"},{"cpes":["cpe:2.3:o:redhat:enterprise_linux_eus:8.1:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux_eus:8.4:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux_eus:8.6:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"8.1"},{"last_affected":"8.2"},{"last_affected":"8.4"},{"last_affected":"8.6"}],"source":"CPE_FIELD","vendor_product":"redhat:enterprise_linux_eus"},{"cpes":["cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux_server_aus:8.4:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux_server_aus:8.6:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"8.2"},{"last_affected":"8.4"},{"last_affected":"8.6"}],"source":"CPE_FIELD","vendor_product":"redhat:enterprise_linux_server_aus"},{"source":"CPE_FIELD","extracted_events":[{"last_affected":"8.2"},{"last_affected":"8.4"},{"last_affected":"8.6"}],"cpes":["cpe:2.3:o:redhat:enterprise_linux_server_tus:8.2:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux_server_tus:8.4:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux_server_tus:8.6:*:*:*:*:*:*:*"],"vendor_product":"redhat:enterprise_linux_server_tus"}]},"references":[{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00053.html"},{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00056.html"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPXN2CLAGN5QSQBTOV5IGVLDOQSRFNTZ/"},{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/109143"},{"type":"ADVISORY","url":"http://www.squid-cache.org/Versions/v4/changesets/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:2593"},{"type":"ADVISORY","url":"https://seclists.org/bugtraq/2019/Aug/42"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4065-1/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2019/dsa-4507"},{"type":"FIX","url":"http://www.squid-cache.org/Versions/v4/changesets/squid-4-7f73e9c5d17664b882ed32590e6af310c247f320.patch"},{"type":"FIX","url":"https://github.com/squid-cache/squid/commits/v4"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/squid-cache/squid","events":[{"introduced":"787b41c3b0ef9b7330032a1947c5f93bd050f32a"},{"last_affected":"2e17b02616d37206ba9cccc53c20667624fbef9f"}],"database_specific":{"source":"CPE_FIELD","extracted_events":[{"introduced":"4.0.23"},{"last_affected":"4.7"}],"cpe":"cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*"}}],"versions":["SQUID_4_7","SQUID_4_6","SQUID_4_5","SQUID_4_4","SQUID_4_3","SQUID_4_2","SQUID_4_1","SQUID_4_0_25","SQUID_4_0_24","SQUID_4_0_23"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-12527.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}