CVE-2019-20454

Name	CVE-2019-20454
Description	An out-of-bounds read was discovered in PCRE before 10.34 when the pattern \X is JIT compiled and used to match specially crafted subjects in non-UTF mode. Applications that use PCRE to parse untrusted input may be vulnerable to this flaw, which would allow an attacker to crash the application. The flaw occurs in do_extuni_no_utf in pcre2_jit_compile.c.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-3363-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
pcre2 (PTS)	bullseye	10.36-2+deb11u1	fixed
	bookworm	10.42-1	fixed
	sid, trixie	10.44-5	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
pcre2	source	buster	10.32-5+deb10u1		DLA-3363-1
pcre2	source	(unstable)	10.34-1

Notes

[stretch] - pcre2 <no-dsa> (Minor issue)
https://bugs.exim.org/show_bug.cgi?id=2421
https://bugs.php.net/bug.php?id=78338
Fixed by: https://vcs.pcre.org/pcre2?view=revision&revision=1092
Tests: https://vcs.pcre.org/pcre2?view=revision&revision=1091