CVE-2007-1661
MEDIUM · CVSS 6.4EPSS 2.5%EU EUVD
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.
Key facts
- CVSS score
- 6.4 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:L/Au:N/C:P/I:N/A:P- EPSS score
- 2.5% (85th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2007-1655)
- Published
- November 7, 2007
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2007-1655 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- apple / mac os x
- apple / mac os x server
- pcre / perl-compatible regular expression library
- pcre / perl-compatible regular expression library
- pcre / perl-compatible regular expression library
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(Vendor Advisory)
- http://secunia.com/advisories/27543(Vendor Advisory)
- http://secunia.com/advisories/27554(Vendor Advisory)
- http://secunia.com/advisories/27697(Vendor Advisory)
- http://secunia.com/advisories/27741(Vendor Advisory)
- http://secunia.com/advisories/27773(Vendor Advisory)
- http://secunia.com/advisories/28136(Vendor Advisory)
- http://secunia.com/advisories/28406(Vendor Advisory)
- http://secunia.com/advisories/28414(Vendor Advisory)
- http://secunia.com/advisories/28714(Vendor Advisory)
- http://secunia.com/advisories/28720(Vendor Advisory)
- http://secunia.com/advisories/29267(Vendor Advisory)
- http://secunia.com/advisories/29420(Vendor Advisory)
- http://secunia.com/advisories/30106(Vendor Advisory)
- http://secunia.com/advisories/30155(Vendor Advisory)
- http://secunia.com/advisories/30219(Vendor Advisory)
- http://security.gentoo.org/glsa/glsa-200711-30.xml
- http://security.gentoo.org/glsa/glsa-200801-02.xml
- http://security.gentoo.org/glsa/glsa-200801-18.xml
- http://security.gentoo.org/glsa/glsa-200801-19.xml
- http://security.gentoo.org/glsa/glsa-200805-11.xml
- http://www.debian.org/security/2007/dsa-1399(Patch)
- http://www.debian.org/security/2008/dsa-1570
- http://www.mandriva.com/security/advisories?name=MDKSA-2007:211
- http://www.novell.com/linux/security/advisories/2007_62_pcre.html
- http://www.pcre.org/changelog.txt
- http://www.securityfocus.com/archive/1/483357/100/0/threaded
- http://www.securityfocus.com/archive/1/483579/100/0/threaded
- http://www.securityfocus.com/bid/26346
- http://www.us-cert.gov/cas/techalerts/TA07-352A.html(US Government Resource)
- http://www.vupen.com/english/advisories/2007/3725
- http://www.vupen.com/english/advisories/2007/3790
- http://www.vupen.com/english/advisories/2007/4238
- http://www.vupen.com/english/advisories/2008/0924/references
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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