Description
The ap_read_request function in server/protocol.c in the Apache HTTP Server 2.2.x before 2.2.15, when a multithreaded MPM is used, does not properly handle headers in subrequests in certain circumstances involving a parent request that has a body, which might allow remote attackers to obtain sensitive information via a crafted request that triggers access to memory locations associated with an earlier request.
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 | 2.2.15-1 | — |
| Debian 13 | apache2 | 2.2.15-1 | — |
| Debian 12 | apache2 | 2.2.15-1 | — |
| Debian 5.0 | apache2 | 2.2.9-10+lenny7 | DSA-2035-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | httpd +2 | 2.2.3-31.el5_4.4 | RHSA-2010:0168 |
| RHEL 5 | mod_ssl | 1:2.2.3-31.el5_4.4 | RHSA-2010:0168 |
| RHEL 4 | httpd +3 | 2.0.52-41.ent.7 | RHSA-2010:0175 |
| RHEL 4 | mod_ssl | 1:2.0.52-41.ent.7 | RHSA-2010:0175 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat JBoss Web Server 1 | httpd +2 | 2.2.14-1.2.6.jdk6.ep5.el5 | RHSA-2010:0396 |
| Red Hat JBoss Web Server 1 | httpd22 +6 | 2.2.14-11.jdk6.ep5.el4 | RHSA-2010:0396 |
| Red Hat JBoss Web Server 1 | mod_ssl | 1:2.2.14-1.2.6.jdk6.ep5.el5 | RHSA-2010:0396 |
| Red Hat JBoss Web Server 1 | mod_ssl22 | 1:2.2.14-11.jdk6.ep5.el4 | RHSA-2010:0396 |
| 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 | 2.4.23-4.1 | openSUSE-SU-2024:10268-1 |
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-2010:0168 Red Hat Security Advisory: httpd security and enhancement update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2010:0175 Red Hat Security Advisory: httpd security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-2035-1 apache2 - several issues Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10268-1 apache2-2.4.23-4.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2010:0396 Red Hat Security Advisory: httpd and httpd22 security and enhancement update Red Hat Security Advisories (RHSA) · Jan 14, 2026
References
- RHSA-2010:0175 vendor-advisory
- 39115 third-party-advisory
- ADV-2010-1411 vdb-entry
- http://svn.apache.org/viewvc/httpd/httpd/branches/2.2.x/server/protocol.c?r1=917617&r2=917867&pathrev=917867&diff_format=h
- http://www.vmware.com/security/advisories/VMSA-2010-0014.html
- ADV-2010-0911 vdb-entry
- 39628 third-party-advisory
- http://support.apple.com/kb/HT4435
- PM12247 vendor-advisory
- FEDORA-2010-6131 vendor-advisory
- oval:org.mitre.oval:def:10358 vdb-entry signature
- oval:org.mitre.oval:def:8695 vdb-entry signature
- HPSBUX02531 vendor-advisory
- PM15829 vendor-advisory
- 39656 third-party-advisory
- https://issues.apache.org/bugzilla/show_bug.cgi?id=48359
- 38494 vdb-entry
- http://www.oracle.com/technetwork/topics/security/cpujuly2013-1899826.html
- RHSA-2010:0168 vendor-advisory
- apache-http-rh-info-disclosure(56625) vdb-entry
- APPLE-SA-2010-11-10-1 vendor-advisory
- 39100 third-party-advisory
- 39501 third-party-advisory
- SUSE-SR:2010:010 vendor-advisory
- [security-announce] 20100923 VMSA-2010-0014 VMware Workstation, Player, and ACE address several security issues mailing-list
- http://httpd.apache.org/security/vulnerabilities_22.html
- http://svn.apache.org/viewvc?view=revision&revision=917867
- 40096 third-party-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=570171
- 39632 third-party-advisory
- DSA-2035 vendor-advisory
- PM08939 vendor-advisory
- FEDORA-2010-5942 vendor-advisory
- http://svn.apache.org/viewvc?view=revision&revision=918427
- ADV-2010-1001 vdb-entry
- ADV-2010-0994 vdb-entry
- ADV-2010-1057 vdb-entry
- [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] 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: 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] 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: 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: r1888194 [7/13] - /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 [7/13] - in /websites/staging/httpd/trunk/content: ./ security/json/ mailing-list
- [httpd-cvs] 20210330 svn commit: r1073149 [7/13] - 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
- [httpd-cvs] 20210330 svn commit: r1073149 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/ mailing-list
- [httpd-cvs] 20210603 svn commit: r1075360 [2/3] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2021-31618.json security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabiliti mailing-list
- [httpd-cvs] 20210603 svn commit: r1075360 [1/3] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2021-31618.json security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabiliti mailing-list
- [httpd-cvs] 20210606 svn commit: r1075467 [2/2] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2021-31618.json security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabiliti mailing-list
- [httpd-cvs] 20210606 svn commit: r1075467 [1/2] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2021-31618.json security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabiliti 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