Description
The ap_some_auth_required function in server/request.c in the Apache HTTP Server 2.4.x before 2.4.14 does not consider that a Require directive may be associated with an authorization setting rather than an authentication setting, which allows remote attackers to bypass intended access restrictions in opportunistic circumstances by leveraging the presence of a module that relies on the 2.2 API behavior.
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 | 2.4.16-1 | — |
| Debian 13 | apache2 | 2.4.16-1 | — |
| Debian 12 | apache2 | 2.4.16-1 | — |
| Debian 8 | apache2 | 2.4.10-10+deb8u1 | DSA-3325-1 |
| Debian 7 | apache2 | 2.2.22-13+deb7u5 | DSA-3325-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | apache2 | 2.4.7-1ubuntu4.5 | USN-2686-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | httpd +5 | 2.4.6-31.ael7b_1.1 | RHSA-2015:1667 |
| RHEL 7 | mod_ssl +1 | 1:2.4.6-31.ael7b_1.1 | RHSA-2015:1667 |
| RHEL 2 | httpd24-httpd +5 | 2.4.12-4.el6.2 | RHSA-2015:1666 |
| RHEL 2 | httpd24-mod_ssl +1 | 1:2.4.12-4.el6.2 | RHSA-2015:1666 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat JBoss Core Services 1 | jbcs-httpd24-httpd +7 | 2.4.23-122.jbcs.el6 | RHSA-2017:2710, RHSA-2017:2709 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_ssl +1 | 1:2.4.23-122.jbcs.el6 | RHSA-2017:2710, RHSA-2017:2709 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-openssl +4 | 1:1.0.2h-14.jbcs.el6 | RHSA-2017:2710, RHSA-2017:2709 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | apache2 | 2.4.10-14.10.1 | SUSE-SU-2015:1851-1 |
| SLES 12 | apache2-mod_auth_kerb | 5.4-2.4.1 | SUSE-SU-2015:1851-1 |
| SLES 12 | apache2-mod_jk | 1.2.40-2.6.1 | SUSE-SU-2015:1851-1 |
| SLES 12 | apache2-mod_security2 | 2.8.0-3.4.1 | SUSE-SU-2015:1851-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 | apache2 | 2.4.10-14.10.1 | SUSE-SU-2015:1851-1 |
| SLES for SAP 12 | apache2-mod_auth_kerb | 5.4-2.4.1 | SUSE-SU-2015:1851-1 |
| SLES for SAP 12 | apache2-mod_jk | 1.2.40-2.6.1 | SUSE-SU-2015:1851-1 |
| SLES for SAP 12 | apache2-mod_security2 | 2.8.0-3.4.1 | SUSE-SU-2015:1851-1 |
| SUSE Enterprise Storage 1.0 | apache2-mod_fastcgi | 2.4.7-3.4.1 | SUSE-SU-2015:1851-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | httpd +5 | 2.4.6-31.0.1.el7_1.1 | ELSA-2015-1667 |
| Oracle Linux 7 | httpd24-httpd +5 | 2.4.12-6.0.1.el7.1 | ELSA-2015-1666 |
| Oracle Linux 7 | httpd24-mod_ssl +1 | 1:2.4.12-6.0.1.el7.1 | ELSA-2015-1666 |
| Oracle Linux 7 | mod_ssl +1 | 1:2.4.6-31.0.1.el7_1.1 | ELSA-2015-1667 |
Advisories 9
- RHSA-2017:2710 Red Hat Security Advisory: Red Hat JBoss Core Services security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2017:2709 Red Hat Security Advisory: Red Hat JBoss Core Services security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2015:1667 Red Hat Security Advisory: httpd security update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2015:1666 Red Hat Security Advisory: httpd24-httpd security update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- USN-2686-1 apache2 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3325-1 apache2 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2015:1851-1 Security update for apache2 SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2015-1666 Moderate: httpd24-httpd security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 4, 2016
- ELSA-2015-1667 Moderate: httpd security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 24, 2015
References
- openSUSE-SU-2015:1684 vendor-advisory
- http://httpd.apache.org/security/vulnerabilities_24.html
- https://github.com/apache/httpd/commit/cd2b7a26c776b0754fb98426a67804fd48118708
- RHSA-2015:1667 vendor-advisory
- https://support.apple.com/HT205217
- http://www.apache.org/dist/httpd/CHANGES_2.4
- APPLE-SA-2015-09-16-2 vendor-advisory
- RHSA-2017:2709 vendor-advisory
- RHSA-2015:1666 vendor-advisory
- 1032967 vdb-entry
- USN-2686-1 vendor-advisory
- APPLE-SA-2015-08-13-2 vendor-advisory
- 75965 vdb-entry
- DSA-3325 vendor-advisory
- RHSA-2016:2957 vendor-advisory
- https://support.apple.com/kb/HT205031
- RHSA-2017:2710 vendor-advisory
- APPLE-SA-2015-09-16-4 vendor-advisory
- https://support.apple.com/HT205219
- RHSA-2017:2708 vendor-advisory
- [httpd-cvs] 20190815 svn commit: r1048743 [4/4] - 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 [4/4] - 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 [4/4] - 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 [4/4] - 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
- https://github.com/apache/httpd/commit/db81019ab88734ed35fa70294a0cfa7a19743f73
- [httpd-cvs] 20210330 svn commit: r1073139 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/json/ mailing-list
- [httpd-cvs] 20210330 svn commit: r1073139 [9/13] - in /websites/staging/httpd/trunk/content: ./ security/json/ mailing-list
- [httpd-cvs] 20210330 svn commit: r1073140 [4/4] - 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 [10/13] - /httpd/site/trunk/content/security/json/ 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: r1073146 [3/3] - 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 [10/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/ mailing-list
- [httpd-cvs] 20210603 svn commit: r1075360 [3/3] - 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: r1075470 [4/4] - 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