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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2017-7186
• https://access.redhat.com/errata/RHSA-2018:2486
• https://blogs.gentoo.org/ago/2017/03/14/libpcre-invalid-memory-read-in-match-pcre_exec-c/
• https://bugs.exim.org/show_bug.cgi?id=2052
• https://security.gentoo.org/glsa/201710-09
• https://security.gentoo.org/glsa/201710-25
• https://vcs.pcre.org/pcre/code/trunk/pcre_internal.h?r1=1649&r2=1688&sortby=date
• https://vcs.pcre.org/pcre/code/trunk/pcre_ucd.c?r1=1490&r2=1688&sortby=date
• 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
• http://www.securityfocus.com/bid/97030