Unrated severityNVD Advisory· Published Nov 7, 2007· Updated Jun 16, 2026
CVE-2007-1661
CVE-2007-1661
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
6cpe:2.3:a:pcre:perl-compatible_regular_expression_library:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:pcre:perl-compatible_regular_expression_library:*:*:*:*:*:*:*:*range: <=7.2
- cpe:2.3:a:pcre:perl-compatible_regular_expression_library:7.0:*:*:*:*:*:*:*
- cpe:2.3:a:pcre:perl-compatible_regular_expression_library:7.1:*:*:*:*:*:*:*
- cpe:2.3:o:apple:mac_os_x:10.4.11:*:*:*:*:*:*:*
- cpe:2.3:o:apple:mac_os_x_server:10.4.11:*:*:*:*:*:*:*
- Range: <7.3
Patches
Vulnerability mechanics
References
44- www.debian.org/security/2007/dsa-1399nvdPatch
- secunia.com/advisories/27538nvdVendor Advisory
- secunia.com/advisories/27543nvdVendor Advisory
- secunia.com/advisories/27554nvdVendor Advisory
- secunia.com/advisories/27697nvdVendor Advisory
- secunia.com/advisories/27741nvdVendor Advisory
- secunia.com/advisories/27773nvdVendor Advisory
- secunia.com/advisories/28136nvdVendor Advisory
- secunia.com/advisories/28406nvdVendor Advisory
- secunia.com/advisories/28414nvdVendor Advisory
- secunia.com/advisories/28714nvdVendor Advisory
- secunia.com/advisories/28720nvdVendor Advisory
- secunia.com/advisories/29267nvdVendor Advisory
- secunia.com/advisories/29420nvdVendor Advisory
- secunia.com/advisories/30106nvdVendor Advisory
- secunia.com/advisories/30155nvdVendor Advisory
- secunia.com/advisories/30219nvdVendor Advisory
- www.us-cert.gov/cas/techalerts/TA07-352A.htmlnvdUS Government Resource
- bugs.gentoo.org/show_bug.cginvd
- docs.info.apple.com/article.htmlnvd
- docs.info.apple.com/article.htmlnvd
- lists.apple.com/archives/security-announce/2007/Dec/msg00002.htmlnvd
- lists.apple.com/archives/security-announce/2008/Mar/msg00001.htmlnvd
- mail.gnome.org/archives/gtk-devel-list/2007-November/msg00022.htmlnvd
- security.gentoo.org/glsa/glsa-200711-30.xmlnvd
- security.gentoo.org/glsa/glsa-200801-02.xmlnvd
- security.gentoo.org/glsa/glsa-200801-18.xmlnvd
- security.gentoo.org/glsa/glsa-200801-19.xmlnvd
- security.gentoo.org/glsa/glsa-200805-11.xmlnvd
- www.debian.org/security/2008/dsa-1570nvd
- www.mandriva.com/security/advisoriesnvd
- www.novell.com/linux/security/advisories/2007_62_pcre.htmlnvd
- www.pcre.org/changelog.txtnvd
- www.securityfocus.com/archive/1/483357/100/0/threadednvd
- www.securityfocus.com/archive/1/483579/100/0/threadednvd
- www.securityfocus.com/bid/26346nvd
- www.vupen.com/english/advisories/2007/3725nvd
- www.vupen.com/english/advisories/2007/3790nvd
- www.vupen.com/english/advisories/2007/4238nvd
- www.vupen.com/english/advisories/2008/0924/referencesnvd
- exchange.xforce.ibmcloud.com/vulnerabilities/38274nvd
- issues.rpath.com/browse/RPL-1738nvd
- usn.ubuntu.com/547-1/nvd
- www.redhat.com/archives/fedora-package-announce/2008-March/msg00181.htmlnvd
News mentions
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