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