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Fencer Vulns
medium 6.8

CVE-2007-6067 json

Algorithmic complexity vulnerability in the regular expression parser in TCL before 8.4.17, as used in PostgreSQL 8.2 before 8.2.6, 8.1 bef…

published 2008-01-09 18 y ago modified 2026-06-16 4 mo ago also EUVD-2007-6037

cvss
6.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.9%
EPSS 3.9% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

Algorithmic complexity vulnerability in the regular expression parser in TCL before 8.4.17, as used in PostgreSQL 8.2 before 8.2.6, 8.1 before 8.1.11, 8.0 before 8.0.15, and 7.4 before 7.4.19, allows remote authenticated users to cause a denial of service (memory consumption) via a crafted "complex" regular expression with doubly-nested states.

Patch / fix

  • tcl RHEL 5 8.4.13-6.el5
  • tcl-html RHEL 5 8.4.13-6.el5
  • postgresql RHEL 1 APPLICATION_STACK 8.1.11-1.el4s1.1
  • postgresql-pl RHEL 1 APPLICATION_STACK 8.1.11-1.el4s1.1
  • postgresql-tcl RHEL 1 APPLICATION_STACK 8.1.11-1.el4s1.1
  • postgresql-libs RHEL 1 APPLICATION_STACK 8.1.11-1.el4s1.1
  • postgresql-test RHEL 1 APPLICATION_STACK 8.1.11-1.el4s1.1
  • postgresql-python RHEL 1 APPLICATION_STACK 8.1.11-1.el4s1.1

red hat advisories RHSA-2013:0122RHSA-2008:0040RHSA-2008:0038

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2007-6067 updated cvss 1.5

postgresql: tempory DoS caused by slow regex NFA cleanup

  • Red Hat Enterprise Linux 4 tcl
    affected: no fix planned “Will not fix”
  • Red Hat Application Stack v1 for Enterprise Linux AS (v.4) postgresql 8.1.11-1.el4s1.1, postgresql-pl 8.1.11-1.el4s1.1, postgresql-tcl 8.1.11-1.el4s1.1, postgresql-libs 8.1.11-1.el4s1.1, postgresql-test 8.1.11-1.el4s1.1, postgresql-python 8.1.11-1.el4s1.1, +2 more Red Hat Application Stack v1 for Enterprise Linux ES (v.4) postgresql 8.1.11-1.el4s1.1, postgresql-pl 8.1.11-1.el4s1.1, postgresql-tcl 8.1.11-1.el4s1.1, postgresql-libs 8.1.11-1.el4s1.1, postgresql-test 8.1.11-1.el4s1.1, postgresql-python 8.1.11-1.el4s1.1, +2 more
    fixed: vendor fix RHSA-2008:0040
  • Red Hat Enterprise Linux (v. 5 server) tcl 8.4.13-6.el5, tcl-html 8.4.13-6.el5, postgresql 8.1.11-1.el5_1.1, postgresql-pl 8.1.11-1.el5_1.1, postgresql-tcl 8.1.11-1.el5_1.1, postgresql-libs 8.1.11-1.el5_1.1, +4 more Red Hat Enterprise Linux AS version 4 postgresql 7.4.19-1.el4_6.1, postgresql-pl 7.4.19-1.el4_6.1, postgresql-tcl 7.4.19-1.el4_6.1, postgresql-jdbc 7.4.19-1.el4_6.1, postgresql-libs 7.4.19-1.el4_6.1, postgresql-test 7.4.19-1.el4_6.1, +3 more Red Hat Enterprise Linux Desktop (v. 5 client) tcl 8.4.13-6.el5, tcl-html 8.4.13-6.el5, postgresql 8.1.11-1.el5_1.1, postgresql-tcl 8.1.11-1.el5_1.1, postgresql-libs 8.1.11-1.el5_1.1, postgresql-python 8.1.11-1.el5_1.1, +1 more Red Hat Enterprise Linux Desktop version 4 postgresql 7.4.19-1.el4_6.1, postgresql-pl 7.4.19-1.el4_6.1, postgresql-tcl 7.4.19-1.el4_6.1, postgresql-jdbc 7.4.19-1.el4_6.1, postgresql-libs 7.4.19-1.el4_6.1, postgresql-test 7.4.19-1.el4_6.1, +3 more Red Hat Enterprise Linux Desktop Workstation (v. 5 client) tcl 8.4.13-6.el5, postgresql 8.1.11-1.el5_1.1, postgresql-pl 8.1.11-1.el5_1.1, postgresql-test 8.1.11-1.el5_1.1, postgresql-server 8.1.11-1.el5_1.1 Red Hat Enterprise Linux ES version 4 postgresql 7.4.19-1.el4_6.1, postgresql-pl 7.4.19-1.el4_6.1, postgresql-tcl 7.4.19-1.el4_6.1, postgresql-jdbc 7.4.19-1.el4_6.1, postgresql-libs 7.4.19-1.el4_6.1, postgresql-test 7.4.19-1.el4_6.1, +3 more
    +1 more products
    Red Hat Enterprise Linux WS version 4 postgresql 7.4.19-1.el4_6.1, postgresql-pl 7.4.19-1.el4_6.1, postgresql-tcl 7.4.19-1.el4_6.1, postgresql-jdbc 7.4.19-1.el4_6.1, postgresql-libs 7.4.19-1.el4_6.1, postgresql-test 7.4.19-1.el4_6.1, +3 more
    fixed: vendor fix RHSA-2008:0038
  • Red Hat Application Stack v2 for Enterprise Linux (v.5) postgresql 8.2.6-1.el5s2, postgresql-tcl 8.2.6-1.el5s2, postgresql-libs 8.2.6-1.el5s2, postgresql-test 8.2.6-1.el5s2, postgresql-pltcl 8.2.6-1.el5s2, postgresql-plperl 8.2.6-1.el5s2, +4 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.85% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • sourceforge.net http://sourceforge.net/tracker/index.php?func=detail&aid=1810264&group_id=10894&atid=110894 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 6.8 AV:N/AC:L/Au:S/C:N/I:N/A:C

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.