Description
In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to document parsing too early; a consecutive call to XML_GetCurrentLineNumber (or XML_GetCurrentColumnNumber) then resulted in a heap-based buffer over-read.
Remediation
References
https://github.com/libexpat/libexpat/pull/318
https://github.com/libexpat/libexpat/commit/c20b758c332d9a13afbbb276d30db1d183a85d43
https://github.com/libexpat/libexpat/issues/317
https://usn.ubuntu.com/4132-1/
https://github.com/libexpat/libexpat/issues/342
https://seclists.org/bugtraq/2019/Sep/30
http://packetstormsecurity.com/files/154503/Slackware-Security-Advisory-expat-Updates.html
https://usn.ubuntu.com/4132-2/
https://www.debian.org/security/2019/dsa-4530
https://seclists.org/bugtraq/2019/Sep/37
https://security.netapp.com/advisory/ntap-20190926-0004/
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00081.html
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00080.html
https://seclists.org/bugtraq/2019/Oct/29
http://packetstormsecurity.com/files/154927/Slackware-Security-Advisory-python-Updates.html
http://packetstormsecurity.com/files/154947/Slackware-Security-Advisory-mozilla-firefox-Updates.html
https://usn.ubuntu.com/4165-1/
https://www.debian.org/security/2019/dsa-4549
https://access.redhat.com/errata/RHSA-2019:3237
https://access.redhat.com/errata/RHSA-2019:3210
https://seclists.org/bugtraq/2019/Nov/1
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00000.html
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00002.html
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00003.html
https://access.redhat.com/errata/RHSA-2019:3756
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00013.html
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00017.html
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00019.html
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00016.html
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00018.html
https://lists.debian.org/debian-lts-announce/2019/11/msg00006.html
https://seclists.org/bugtraq/2019/Nov/24
https://www.debian.org/security/2019/dsa-4571
https://lists.debian.org/debian-lts-announce/2019/11/msg00017.html
https://security.gentoo.org/glsa/201911-08
https://usn.ubuntu.com/4202-1/
https://support.apple.com/kb/HT210788
https://support.apple.com/kb/HT210785
https://support.apple.com/kb/HT210790
https://support.apple.com/kb/HT210789
https://seclists.org/bugtraq/2019/Dec/21
https://seclists.org/bugtraq/2019/Dec/23
https://seclists.org/bugtraq/2019/Dec/17
https://support.apple.com/kb/HT210793
https://support.apple.com/kb/HT210795
https://support.apple.com/kb/HT210794
http://seclists.org/fulldisclosure/2019/Dec/23
http://seclists.org/fulldisclosure/2019/Dec/26
http://seclists.org/fulldisclosure/2019/Dec/27
http://seclists.org/fulldisclosure/2019/Dec/30
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00008.html
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html
https://www.oracle.com/security-alerts/cpuapr2020.html
https://usn.ubuntu.com/4335-1/
https://www.oracle.com/security-alerts/cpuoct2020.html
https://www.tenable.com/security/tns-2021-11
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BDUTI5TVQWIGGQXPEVI4T2ENHFSBMIBP/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A4TZKPJFTURRLXIGLB34WVKQ5HGY6JJA/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S26LGXXQ7YF2BP3RGOWELBFKM6BHF6UG/
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