Denial of service in TCL



| Updated: 2025-06-23
Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2007-6067
CVE-2007-4769
CVE-2007-4772
CWE-ID CWE-185
CWE-835
Exploitation vector Network
Public exploit N/A
Vulnerable software
 tcl
Other software / Other software solutions

Vendor tcl.sourceforge.net

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Incorrect Regular Expression

EUVDB-ID: #VU111755

Risk: Medium

CVSSv4.0: 2.7 [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-2007-6067

CWE-ID: CWE-185 - Incorrect Regular Expression

Exploit availability: No

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

tcl: 8.0.2 - 8.4.16

CPE2.3 External links

https://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01420154
https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705
https://lists.opensuse.org/opensuse-security-announce/2008-02/msg00000.html
https://rhn.redhat.com/errata/RHSA-2013-0122.html
https://security.gentoo.org/glsa/glsa-200801-15.xml
https://securitytracker.com/id?1019157
https://sourceforge.net/project/shownotes.php?release_id=565440&group_id=10894
https://sourceforge.net/tracker/index.php?func=detail&aid=1810264&group_id=10894&atid=110894
https://sunsolve.sun.com/search/document.do?assetkey=1-26-103197-1
https://sunsolve.sun.com/search/document.do?assetkey=1-66-200559-1
https://www.debian.org/security/2008/dsa-1460
https://www.debian.org/security/2008/dsa-1463
https://www.mandriva.com/security/advisories?name=MDVSA-2008:004
https://www.postgresql.org/about/news.905
https://www.redhat.com/support/errata/RHSA-2008-0038.html
https://www.redhat.com/support/errata/RHSA-2008-0040.html
https://www.securityfocus.com/archive/1/485864/100/0/threaded
https://www.securityfocus.com/archive/1/486407/100/0/threaded
https://www.securityfocus.com/bid/27163
https://www.vupen.com/english/advisories/2008/0061
https://www.vupen.com/english/advisories/2008/0109
https://www.vupen.com/english/advisories/2008/1071/references
https://exchange.xforce.ibmcloud.com/vulnerabilities/39498
https://issues.rpath.com/browse/RPL-1768
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10235
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


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Incorrect Regular Expression

EUVDB-ID: #VU111758

Risk: Medium

CVSSv4.0: 2.7 [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 - Incorrect Regular Expression

Exploit availability: No

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

tcl: 8.0.2 - 8.4.16

CPE2.3 External links

https://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01420154
https://lists.opensuse.org/opensuse-security-announce/2008-02/msg00000.html
https://security.gentoo.org/glsa/glsa-200801-15.xml
https://securitytracker.com/id?1019157
https://sourceforge.net/project/shownotes.php?release_id=565440&group_id=10894
https://sourceforge.net/tracker/index.php?func=detail&aid=1810264&group_id=10894&atid=110894
https://sunsolve.sun.com/search/document.do?assetkey=1-26-103197-1
https://sunsolve.sun.com/search/document.do?assetkey=1-66-200559-1
https://www.debian.org/security/2008/dsa-1460
https://www.debian.org/security/2008/dsa-1463
https://www.mandriva.com/security/advisories?name=MDVSA-2008:004
https://www.postgresql.org/about/news.905
https://www.redhat.com/support/errata/RHSA-2008-0038.html
https://www.redhat.com/support/errata/RHSA-2008-0040.html
https://www.securityfocus.com/archive/1/485864/100/0/threaded
https://www.securityfocus.com/archive/1/486407/100/0/threaded
https://www.securityfocus.com/bid/27163
https://www.vupen.com/english/advisories/2008/0061
https://www.vupen.com/english/advisories/2008/0109
https://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


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Infinite loop

EUVDB-ID: #VU111757

Risk: Medium

CVSSv4.0: 2.7 [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-2007-4772

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop. A remote attacker can consume all available system resources and cause denial of service conditions.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

tcl: 8.0.2 - 8.4.16

CPE2.3 External links

https://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01420154
https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705
https://lists.opensuse.org/opensuse-security-announce/2008-02/msg00000.html
https://lists.opensuse.org/opensuse-security-announce/2016-02/msg00049.html
https://lists.opensuse.org/opensuse-security-announce/2016-02/msg00052.html
https://lists.opensuse.org/opensuse-security-announce/2016-02/msg00054.html
https://lists.opensuse.org/opensuse-security-announce/2016-02/msg00056.html
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00016.html
https://rhn.redhat.com/errata/RHSA-2013-0122.html
https://security.gentoo.org/glsa/glsa-200801-15.xml
https://securitytracker.com/id?1019157
https://sourceforge.net/project/shownotes.php?release_id=565440&group_id=10894
https://sourceforge.net/tracker/index.php?func=detail&aid=1810264&group_id=10894&atid=110894
https://sunsolve.sun.com/search/document.do?assetkey=1-26-103197-1
https://sunsolve.sun.com/search/document.do?assetkey=1-66-200559-1
https://www.debian.org/security/2008/dsa-1460
https://www.debian.org/security/2008/dsa-1463
https://www.mandriva.com/security/advisories?name=MDVSA-2008:004
https://www.mandriva.com/security/advisories?name=MDVSA-2008:059
https://www.postgresql.org/about/news.905
https://www.redhat.com/support/errata/RHSA-2008-0038.html
https://www.redhat.com/support/errata/RHSA-2008-0040.html
https://www.redhat.com/support/errata/RHSA-2008-0134.html
https://www.securityfocus.com/archive/1/485864/100/0/threaded
https://www.securityfocus.com/archive/1/486407/100/0/threaded
https://www.securityfocus.com/archive/1/493080/100/0/threaded
https://www.securityfocus.com/bid/27163
https://www.vmware.com/security/advisories/VMSA-2008-0009.html
https://www.vupen.com/english/advisories/2008/0061
https://www.vupen.com/english/advisories/2008/0109
https://www.vupen.com/english/advisories/2008/1071/references
https://www.vupen.com/english/advisories/2008/1744
https://exchange.xforce.ibmcloud.com/vulnerabilities/39497
https://issues.rpath.com/browse/RPL-1768
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11569
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


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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