CVE-2007-1661

MediumCVSS 6.4/10Last modified Jun 16, 2026

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.

Metrics

CVSS 2.0 6.4/10AV:N/AC:L/Au:N/C:P/I:N/A:P

Affected software

No affected versions have been published.

Timeline

Published
Nov 7, 2007
Last modified
Jun 16, 2026
NVD status
Modified

Related CVEs from 2007

CVE-2007-16625.0Perl-Compatible Regular Expression (PCRE) library before 7.3 reads past the end of the string when searching for unmatched brackets and pareCVE-2007-16635.0Memory leak in the image message functionality in ekg before 1:1.7~rc2-1etch1 on Debian GNU/Linux Etch allows remote attackers to cause a deCVE-2007-16645.0ekg before 1:1.7~rc2-1etch1 on Debian GNU/Linux Etch allows remote attackers to cause a denial of service (NULL pointer dereference) via a vCVE-2007-16655.0Memory leak in the token OCR functionality in ekg before 1:1.7~rc2-1etch1 on Debian GNU/Linux Etch allows remote attackers to cause a denialCVE-2007-166610.0The processor_request function in the debugger server for DataRescue IDA Pro 5.0 and 5.1 does not verify that authentication has taken placeCVE-2007-16679.3Multiple integer overflows in (1) the XGetPixel function in ImUtil.c in X.Org libx11 before 1.0.3, and (2) XInitImage function in xwd.c for CVE-2007-16697.8zoo decoder 2.10 (zoo-2.10), as used in multiple products including (1) Barracuda Spam Firewall 3.4 and later with virusdef before 2.0.6399,CVE-2007-16707.8Panda Software Antivirus before 20070402 allows remote attackers to cause a denial of service (infinite loop) via a ZOO archive with a direnCVE-2007-16717.8avpack32.dll before 7.3.0.6 in Avira AntiVir allows remote attackers to cause a denial of service (infinite loop) via a ZOO archive with a dCVE-2007-16727.8avast! antivirus before 4.7.981 allows remote attackers to cause a denial of service (infinite loop) via a ZOO archive with a direntry strucCVE-2007-16737.8unzoo.c, as used in multiple products including AMaViS 2.4.1 and earlier, allows remote attackers to cause a denial of service (infinite looCVE-2007-167410.0Stack-based buffer overflow in the Alert Service (aolnsrvr.exe) in LANDesk Management Suite 8.7 allows remote attackers to execute arbitrary
CVE-2007-1661: Medium severity, CVSS 6.4 | Vulnix