Incorrect Regular Expression in tcl - CVE-2007-4769
Published: June 23, 2025
Vulnerability identifier: #VU111758
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2007-4769
CWE-ID: CWE-185
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: tcl.sourceforge.net
Affected software:
tcl
tcl
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient input validation when processing regular expressions. A remote attacker can pass specially crafted data to the application and perform regular expression denial of service (ReDos) attack.
How to mitigate CVE-2007-4769
Install updates from vendor's website.
Sources
- http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01420154
- http://lists.opensuse.org/opensuse-security-announce/2008-02/msg00000.html
- http://security.gentoo.org/glsa/glsa-200801-15.xml
- http://securitytracker.com/id?1019157
- http://sourceforge.net/project/shownotes.php?release_id=565440&group_id=10894
- http://sourceforge.net/tracker/index.php?func=detail&aid=1810264&group_id=10894&atid=110894
- http://sunsolve.sun.com/search/document.do?assetkey=1-26-103197-1
- http://sunsolve.sun.com/search/document.do?assetkey=1-66-200559-1
- http://www.debian.org/security/2008/dsa-1460
- http://www.debian.org/security/2008/dsa-1463
- http://www.mandriva.com/security/advisories?name=MDVSA-2008:004
- http://www.postgresql.org/about/news.905
- http://www.redhat.com/support/errata/RHSA-2008-0038.html
- http://www.redhat.com/support/errata/RHSA-2008-0040.html
- http://www.securityfocus.com/archive/1/485864/100/0/threaded
- http://www.securityfocus.com/archive/1/486407/100/0/threaded
- http://www.securityfocus.com/bid/27163
- http://www.vupen.com/english/advisories/2008/0061
- http://www.vupen.com/english/advisories/2008/0109
- http://www.vupen.com/english/advisories/2008/1071/references
- https://exchange.xforce.ibmcloud.com/vulnerabilities/39499
- https://issues.rpath.com/browse/RPL-1768
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9804
- https://usn.ubuntu.com/568-1/
- https://www.redhat.com/archives/fedora-package-announce/2008-January/msg00397.html
- https://www.redhat.com/archives/fedora-package-announce/2008-January/msg00469.html