In libexpat before 2.2.8, crafted XML input could fool the...

Vulnerability 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.

References

• https://usn.ubuntu.com/4132-1/
• https://seclists.org/bugtraq/2019/Sep/30
• https://usn.ubuntu.com/4132-2/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BDUTI5TVQWIGGQXPEVI4T2ENHFSBMIBP/
• https://www.debian.org/security/2019/dsa-4530
• https://seclists.org/bugtraq/2019/Sep/37
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A4TZKPJFTURRLXIGLB34WVKQ5HGY6JJA/
• http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00081.html
• http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00080.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S26LGXXQ7YF2BP3RGOWELBFKM6BHF6UG/
• https://seclists.org/bugtraq/2019/Oct/29
• https://usn.ubuntu.com/4165-1/
• https://www.debian.org/security/2019/dsa-4549
• https://access.redhat.com/errata/RHSA-2019:3210
• https://access.redhat.com/errata/RHSA-2019:3237
• 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/msg00016.html
• http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00018.html
• http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00017.html
• http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00019.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://seclists.org/bugtraq/2019/Dec/17
• https://seclists.org/bugtraq/2019/Dec/21
• https://seclists.org/bugtraq/2019/Dec/23
• http://seclists.org/fulldisclosure/2019/Dec/23
• http://seclists.org/fulldisclosure/2019/Dec/26
• http://seclists.org/fulldisclosure/2019/Dec/30
• http://seclists.org/fulldisclosure/2019/Dec/27
• http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00008.html
• http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html
• https://usn.ubuntu.com/4335-1/
• https://www.oracle.com/security-alerts/cpuapr2020.html
• https://www.oracle.com/security-alerts/cpuoct2020.html
• https://github.com/libexpat/libexpat/issues/317
• https://github.com/libexpat/libexpat/pull/318
• https://github.com/libexpat/libexpat/commit/c20b758c332d9a13afbbb276d30db1d183a85d43
• https://github.com/libexpat/libexpat/issues/342
• http://packetstormsecurity.com/files/154503/Slackware-Security-Advisory-expat-Updates.html
• https://security.netapp.com/advisory/ntap-20190926-0004/
• http://packetstormsecurity.com/files/154927/Slackware-Security-Advisory-python-Updates.html
• http://packetstormsecurity.com/files/154947/Slackware-Security-Advisory-mozilla-firefox-Updates.html
• https://support.apple.com/kb/HT210788
• https://support.apple.com/kb/HT210790
• https://support.apple.com/kb/HT210785
• https://support.apple.com/kb/HT210789
• https://support.apple.com/kb/HT210793
• https://support.apple.com/kb/HT210795
• https://support.apple.com/kb/HT210794
• https://www.tenable.com/security/tns-2021-11