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Debian LTS Advisory DLA-3363-1                [email protected]
https://www.debian.org/lts/security/                       Guilhem Moulin
March 16, 2023                                https://wiki.debian.org/LTS
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Package        : pcre2
Version        : 10.32-5+deb10u1
CVE ID         : CVE-2019-20454 CVE-2022-1586 CVE-2022-1587
Debian Bug     : 1011954

Multiple out-of-bounds read vulnerabilities were found in pcre2, a Perl
Compatible Regular Expression library, which could result in information
disclosure or denial or service.

CVE-2019-20454

    Out-of-bounds read when the pattern \X is JIT compiled and used to
    match specially crafted subjects in non-UTF mode.

CVE-2022-1586

    Out-of-bounds read involving unicode property matching in
    JIT-compiled regular expressions. The issue occurs because the
    character was not fully read in case-less matching within JIT.

CVE-2022-1587

    Out-of-bounds read affecting recursions in JIT-compiled regular
    expressions caused by duplicate data transfers.

This upload also fixes a subject buffer overread in JIT when UTF is
disabled and \X or \R has a greater than 1 fixed quantifier. This issue
was found by Yunho Kim.

For Debian 10 buster, these problems have been fixed in version
10.32-5+deb10u1.

We recommend that you upgrade your pcre2 packages.

For the detailed security status of pcre2 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/pcre2

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS