CVE-2007-1661

Severity: medium (CVSS 6.4 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2007-11-07 · updated 2026-06-16

Description

Perl-Compatible Regular Expression (PCRE) library before 7.3 backtracks too far when matching certain input bytes against some regex patterns in non-UTF-8 mode, which allows context-dependent attackers to obtain sensitive information or cause a denial of service (crash), as demonstrated by the "\X?\d" and "\P{L}?\d" patterns.

Affected products

macOS: 10.4.11
Apple Mac Os X Server: 10.4.11
PCRE Perl-Compatible Regular Expression Library: through 7.2; 7.0, 7.1

References

http://bugs.gentoo.org/show_bug.cgi?id=198976
http://docs.info.apple.com/article.html?artnum=307179
http://docs.info.apple.com/article.html?artnum=307562
http://lists.apple.com/archives/security-announce/2007/Dec/msg00002.html
http://lists.apple.com/archives/security-announce/2008/Mar/msg00001.html
http://mail.gnome.org/archives/gtk-devel-list/2007-November/msg00022.html
http://secunia.com/advisories/27538
http://secunia.com/advisories/27543
http://secunia.com/advisories/27554
http://secunia.com/advisories/27697
http://secunia.com/advisories/27741
http://secunia.com/advisories/27773

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