Description
The balancer_handler function in mod_proxy_balancer in the Apache HTTP Server 2.2.0 through 2.2.6, when a threaded Multi-Processing Module is used, allows remote authenticated users to cause a denial of service (child process crash) via an invalid bb variable.
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 | 2.2.8-1 | — |
| Debian 13 | apache2 | 2.2.8-1 | — |
| Debian 12 | apache2 | 2.2.8-1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | httpd +2 | 2.2.3-11.el5_1.3 | RHSA-2008:0008 |
| RHEL 5 | mod_ssl | 1:2.2.3-11.el5_1.3 | RHSA-2008:0008 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Application Stack 2 | httpd +2 | 2.2.4-9.el5s2 | RHSA-2008:0009 |
| Red Hat Rhel Application Stack 2 | mod_ssl | 1:2.2.4-9.el5s2 | RHSA-2008:0009 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | apache2 | 2.4.49-1.1 | openSUSE-SU-2024:10623-1 |
Advisories 3
- RHSA-2008:0008 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-2008:0009 Red Hat Security Advisory: httpd security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
References
- GLSA-200803-19 vendor-advisory
- 28749 third-party-advisory
- 3523 third-party-advisory
- FEDORA-2008-1695 vendor-advisory
- 28526 third-party-advisory
- oval:org.mitre.oval:def:10181 vdb-entry signature
- 27236 vdb-entry
- RHSA-2008:0008 vendor-advisory
- FEDORA-2008-1711 vendor-advisory
- RHSA-2008:0009 vendor-advisory
- http://httpd.apache.org/security/vulnerabilities_22.html
- ADV-2008-0048 vdb-entry
- 29348 third-party-advisory
- SUSE-SA:2008:021 vendor-advisory
- 20080110 SecurityReason - Apache2 CSRF, XSS, Memory Corruption and Denial of Service Vulnerability mailing-list
- oval:org.mitre.oval:def:8690 vdb-entry signature
- apache-modproxybalancer-dos(39476) vdb-entry
- USN-575-1 vendor-advisory
- 29640 third-party-advisory
- 28977 third-party-advisory
- MDVSA-2008:016 vendor-advisory
- [httpd-cvs] 20190815 svn commit: r1048743 [3/4] - 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: r1048742 [3/4] - 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 [3/4] - 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 [3/4] - 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 [5/13] - /httpd/site/trunk/content/security/json/ mailing-list
- [httpd-cvs] 20210330 svn commit: r1073140 [3/4] - 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: r1073139 [5/13] - in /websites/staging/httpd/trunk/content: ./ 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
- [httpd-cvs] 20210330 svn commit: r1073149 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/ mailing-list
- [httpd-cvs] 20210330 svn commit: r1073149 [6/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/ mailing-list
- [httpd-cvs] 20210606 svn commit: r1075470 [3/4] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2020-13938.json security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabiliti mailing-list