Arch Linux: ASA-201710-18 Medium: PCRE2 Denial Of Service Threat

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
=========
;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/
;r2=670&sortby=date
;r2=670&sortby=date
https://security.archlinux.org/CVE-2017-7186