Description
cache_util.c in the mod_cache module in Apache HTTP Server (httpd), when caching is enabled and a threaded Multi-Processing Module (MPM) is used, allows remote attackers to cause a denial of service (child processing handler crash) via a request with the (1) s-maxage, (2) max-age, (3) min-fresh, or (4) max-stale Cache-Control headers without a value.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | apache2 | 2.2.4-1 | — |
| Debian 13 | apache2 | 2.2.4-1 | — |
| Debian 12 | apache2 | 2.2.4-1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | httpd +2 | 2.2.3-7.el5 | RHSA-2007:0556 |
| RHEL 5 | mod_ssl | 1:2.2.3-7.el5 | RHSA-2007:0556 |
| RHEL 4 | httpd +3 | 2.0.52-32.2.ent | RHSA-2007:0534 |
| RHEL 4 | mod_ssl | 1:2.0.52-32.2.ent | RHSA-2007:0534 |
| RHEL 3 | httpd +1 | 2.0.46-67.ent | RHSA-2007:0533 |
| RHEL 3 | mod_ssl | 1:2.0.46-67.ent | RHSA-2007:0533 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Application Stack 1 | httpd +2 | 2.0.59-1.el4s1.7 | RHSA-2007:0557 |
| Red Hat Rhel Application Stack 1 | mod_ssl | 1:2.0.59-1.el4s1.7 | RHSA-2007:0557 |
| Red Hat Certificate System 7 | ant | 1.6.5-1jpp_1rh | RHSA-2010:0602 |
| Red Hat Certificate System 7 | avalon-logkit | 1.2-2jpp_4rh | RHSA-2010:0602 |
| Red Hat Certificate System 7 | axis | 1.2.1-1jpp_3rh | RHSA-2010:0602 |
| Red Hat Certificate System 7 | classpathx-jaf | 1.0-2jpp_6rh | RHSA-2010:0602 |
| Red Hat Certificate System 7 | classpathx-mail | 1.1.1-2jpp_8rh | RHSA-2010:0602 |
| Red Hat Certificate System 7 | geronimo-specs +10 | 1.0-0.M4.1jpp_10rh | RHSA-2010:0602 |
| Red Hat Certificate System 7 | jakarta-commons-modeler | 2.0-3jpp_2rh | RHSA-2010:0602 |
| Red Hat Certificate System 7 | log4j | 1.2.12-1jpp_1rh | RHSA-2010:0602 |
| Red Hat Certificate System 7 | mx4j | 1:3.0.1-1jpp_4rh | RHSA-2010:0602 |
| Red Hat Certificate System 7 | pcsc-lite +2 | 1.3.3-3.el4 | RHSA-2010:0602 |
| Red Hat Certificate System 7 | rhpki-ca | 7.3.0-20.el4 | RHSA-2010:0602 |
| Red Hat Certificate System 7 | rhpki-java-tools | 7.3.0-10.el4 | RHSA-2010:0602 |
| Red Hat Certificate System 7 | rhpki-kra | 7.3.0-14.el4 | RHSA-2010:0602 |
| Red Hat Certificate System 7 | rhpki-manage | 7.3.0-19.el4 | RHSA-2010:0602 |
| Red Hat Certificate System 7 | rhpki-native-tools | 7.3.0-6.el4 | RHSA-2010:0602 |
| Red Hat Certificate System 7 | rhpki-tks +1 | 7.3.0-13.el4 | RHSA-2010:0602 |
| Red Hat Certificate System 7 | tomcat5 +5 | 5.5.23-0jpp_4rh.16 | RHSA-2010:0602 |
| Red Hat Certificate System 7 | xerces-j2 | 2.7.1-1jpp_1rh | RHSA-2010:0602 |
| Red Hat Certificate System 7 | xml-commons +1 | 1.3.02-2jpp_1rh | RHSA-2010:0602 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | apache2 | 2.4.49-1.1 | openSUSE-SU-2024:10623-1 |
Advisories 6
- RHSA-2010:0602 Red Hat Security Advisory: Red Hat Certificate System 7.3 security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2007:0556 Red Hat Security Advisory: httpd security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2007:0534 Red Hat Security Advisory: httpd security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2007:0533 Red Hat Security Advisory: httpd security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- openSUSE-SU-2024:10623-1 apache2-2.4.49-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2007:0557 Red Hat Security Advisory: httpd security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
References
- 28606 third-party-advisory
- RHSA-2007:0533 vendor-advisory
- 26822 third-party-advisory
- RHSA-2007:0557 vendor-advisory
- PK52702 vendor-advisory
- MDKSA-2007:140 vendor-advisory
- 25920 third-party-advisory
- 26993 third-party-advisory
- 27563 third-party-advisory
- 27732 third-party-advisory
- PK49355 vendor-advisory
- RHSA-2007:0556 vendor-advisory
- http://httpd.apache.org/security/vulnerabilities_20.html
- TA08-150A third-party-advisory
- SUSE-SA:2007:061 vendor-advisory
- FEDORA-2007-2214 vendor-advisory
- 2007-0026 vendor-advisory
- http://httpd.apache.org/security/vulnerabilities_22.html
- 30430 third-party-advisory
- 24649 vdb-entry
- APPLE-SA-2008-05-28 vendor-advisory
- ADV-2007-3386 vdb-entry
- 37079 vdb-entry
- 20090821 VMSA-2009-0010 VMware Hosted products update libpng and Apache HTTP Server mailing-list
- MDKSA-2007:141 vendor-advisory
- ADV-2008-0233 vdb-entry
- http://www.fujitsu.com/global/support/software/security/products-f/interstage-200802e.html
- 1018303 vdb-entry
- 27037 third-party-advisory
- 26443 third-party-advisory
- [security-announce] 20090820 VMSA-2009-0010 VMware Hosted products update libpng and Apache HTTP Server mailing-list
- GLSA-200711-06 vendor-advisory
- https://issues.rpath.com/browse/RPL-1500
- oval:org.mitre.oval:def:9824 vdb-entry signature
- SSRT071447 vendor-advisory
- 25830 third-party-advisory
- ADV-2008-1697 vdb-entry
- USN-499-1 vendor-advisory
- 26508 third-party-advisory
- http://support.avaya.com/elmodocs2/security/ASA-2007-353.htm
- 26842 third-party-advisory
- ADV-2007-3283 vdb-entry
- http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=244658
- ADV-2007-2727 vdb-entry
- http://svn.apache.org/viewvc?view=rev&revision=535617
- RHSA-2007:0534 vendor-advisory
- 26273 third-party-advisory
- 25873 third-party-advisory
- http://bugs.gentoo.org/show_bug.cgi?id=186219
- [httpd-cvs] 20190815 svn commit: r1048742 [2/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilit mailing-list
- [httpd-cvs] 20190815 svn commit: r1048743 [2/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilit mailing-list
- [httpd-cvs] 20200401 svn commit: r1058586 [2/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilit mailing-list
- [httpd-cvs] 20200401 svn commit: r1058587 [2/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilit mailing-list
- [httpd-cvs] 20210330 svn commit: r1073139 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/json/ mailing-list
- [httpd-cvs] 20210330 svn commit: r1888194 [4/13] - /httpd/site/trunk/content/security/json/ mailing-list
- [httpd-cvs] 20210330 svn commit: r1073140 [2/4] - in /websites/staging/httpd/trunk/content: ./ security/cvejsontohtml.py security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.ht mailing-list
- [httpd-cvs] 20210330 svn commit: r1073143 [2/3] - in /websites/staging/httpd/trunk/content: ./ security/ mailing-list
- [httpd-cvs] 20210330 svn commit: r1073139 [4/13] - in /websites/staging/httpd/trunk/content: ./ security/json/ mailing-list
- [httpd-cvs] 20210330 svn commit: r1073149 [5/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/ mailing-list
- [httpd-cvs] 20210330 svn commit: r1073146 [2/3] - in /websites/staging/httpd/trunk/content: ./ security/cvejsontohtml.py security/vulnerabilities-httpd.xml security/vulnerabilities_22.html security/vulnerabilities_24.html mailing-list