[manjaro-security] [arch-security] [ASA-201710-18] pcre2: denial of service

[Levente Polyak]

Arch Linux Security Advisory ASA-201710-18
==========================================

Severity: Medium
Date    : 2017-10-12
CVE-ID  : CVE-2017-7186
Package : pcre2
Type    : denial of service
Remote  : Yes
Link    : https://security.archlinux.org/AVG-223

Summary
=======

The package pcre2 before version 10.30-1 is vulnerable to denial of
service.

Resolution
==========

Upgrade to 10.30-1.

# pacman -Syu "pcre2>=10.30-1"

The problem has been fixed upstream in version 10.30.

Workaround
==========

None.

Description
===========

libpcre1 in PCRE 8.40 and libpcre2 in PCRE2 10.23 allow remote
attackers to cause a denial of service (segmentation violation for read
access, and application crash) by triggering an invalid Unicode
property lookup.

Impact
======

A remote attacker is able to crash the application by triggering an
invalid Unicode property lookup.

References
==========

https://vcs.pcre.org/pcre/code/trunk/pcre_ucd.c?r1=1490&r2=1688&sortby=date
https://bugs.exim.org/show_bug.cgi?id=2052
https://blogs.gentoo.org/ago/2017/03/14/libpcre-invalid-memory-read-in-match-pcre_exec-c/
https://vcs.pcre.org/pcre2/code/trunk/src/pcre2_internal.h?r1=600&r2=670&sortby=date
https://vcs.pcre.org/pcre2/code/trunk/src/pcre2_ucd.c?r1=316&r2=670&sortby=date
https://security.archlinux.org/CVE-2017-7186

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