| 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) | stretch (lts), stretch | 10.22-3+deb9u1 | fixed |
| buster (security), buster, buster (lts) | 10.32-5+deb10u1 | fixed |
| bullseye | 10.36-2+deb11u1 | fixed |
| bookworm | 10.42-1 | fixed |
| trixie | 10.42-4 | fixed |
| sid | 10.44-4 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| pcre2 | source | stretch | (not affected) | | | |
| 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
[stretch] - pcre2 <not-affected> (Vulnerable code introduced later at version 10.31)