RHSA-2021:4257: Moderate: httpd:2.4 security, bug fix, and enhancement update
First published: Tue Nov 09 2021(Updated: )
The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.<br>Security Fix(es):<br><li> httpd: mod_session: NULL pointer dereference when parsing Cookie header (CVE-2021-26690)</li> <li> httpd: Unexpected URL matching with 'MergeSlashes OFF' (CVE-2021-30641)</li> For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.<br>Additional Changes:<br>For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from the References section.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/httpd | <2.4.37-41.module+el8.5.0+11772+c8e0c271 | 2.4.37-41.module+el8.5.0+11772+c8e0c271 |
| redhat/httpd | <2.4.37-41.module+el8.5.0+11772+c8e0c271 | 2.4.37-41.module+el8.5.0+11772+c8e0c271 |
| redhat/httpd-debuginfo | <2.4.37-41.module+el8.5.0+11772+c8e0c271 | 2.4.37-41.module+el8.5.0+11772+c8e0c271 |
| redhat/httpd-debugsource | <2.4.37-41.module+el8.5.0+11772+c8e0c271 | 2.4.37-41.module+el8.5.0+11772+c8e0c271 |
| redhat/httpd-devel | <2.4.37-41.module+el8.5.0+11772+c8e0c271 | 2.4.37-41.module+el8.5.0+11772+c8e0c271 |
| redhat/httpd-filesystem | <2.4.37-41.module+el8.5.0+11772+c8e0c271 | 2.4.37-41.module+el8.5.0+11772+c8e0c271 |
| redhat/httpd-manual | <2.4.37-41.module+el8.5.0+11772+c8e0c271 | 2.4.37-41.module+el8.5.0+11772+c8e0c271 |
| redhat/httpd-tools | <2.4.37-41.module+el8.5.0+11772+c8e0c271 | 2.4.37-41.module+el8.5.0+11772+c8e0c271 |
| redhat/httpd-tools-debuginfo | <2.4.37-41.module+el8.5.0+11772+c8e0c271 | 2.4.37-41.module+el8.5.0+11772+c8e0c271 |
| redhat/httpd-debuginfo | <2.4.37-41.module+el8.5.0+11772+c8e0c271 | 2.4.37-41.module+el8.5.0+11772+c8e0c271 |
| redhat/httpd-debugsource | <2.4.37-41.module+el8.5.0+11772+c8e0c271 | 2.4.37-41.module+el8.5.0+11772+c8e0c271 |
| redhat/httpd-devel | <2.4.37-41.module+el8.5.0+11772+c8e0c271 | 2.4.37-41.module+el8.5.0+11772+c8e0c271 |
| redhat/httpd-tools | <2.4.37-41.module+el8.5.0+11772+c8e0c271 | 2.4.37-41.module+el8.5.0+11772+c8e0c271 |
| redhat/httpd-tools-debuginfo | <2.4.37-41.module+el8.5.0+11772+c8e0c271 | 2.4.37-41.module+el8.5.0+11772+c8e0c271 |
| redhat/httpd | <2.4.37-41.module+el8.5.0+11772+c8e0c271 | 2.4.37-41.module+el8.5.0+11772+c8e0c271 |
| redhat/httpd-debuginfo | <2.4.37-41.module+el8.5.0+11772+c8e0c271 | 2.4.37-41.module+el8.5.0+11772+c8e0c271 |
| redhat/httpd-debugsource | <2.4.37-41.module+el8.5.0+11772+c8e0c271 | 2.4.37-41.module+el8.5.0+11772+c8e0c271 |
| redhat/httpd-devel | <2.4.37-41.module+el8.5.0+11772+c8e0c271 | 2.4.37-41.module+el8.5.0+11772+c8e0c271 |
| redhat/httpd-tools | <2.4.37-41.module+el8.5.0+11772+c8e0c271 | 2.4.37-41.module+el8.5.0+11772+c8e0c271 |
| redhat/httpd-tools-debuginfo | <2.4.37-41.module+el8.5.0+11772+c8e0c271 | 2.4.37-41.module+el8.5.0+11772+c8e0c271 |
| redhat/httpd | <2.4.37-41.module+el8.5.0+11772+c8e0c271.aa | 2.4.37-41.module+el8.5.0+11772+c8e0c271.aa |
| redhat/httpd-debuginfo | <2.4.37-41.module+el8.5.0+11772+c8e0c271.aa | 2.4.37-41.module+el8.5.0+11772+c8e0c271.aa |
| redhat/httpd-debugsource | <2.4.37-41.module+el8.5.0+11772+c8e0c271.aa | 2.4.37-41.module+el8.5.0+11772+c8e0c271.aa |
| redhat/httpd-devel | <2.4.37-41.module+el8.5.0+11772+c8e0c271.aa | 2.4.37-41.module+el8.5.0+11772+c8e0c271.aa |
| redhat/httpd-tools | <2.4.37-41.module+el8.5.0+11772+c8e0c271.aa | 2.4.37-41.module+el8.5.0+11772+c8e0c271.aa |
| redhat/httpd-tools-debuginfo | <2.4.37-41.module+el8.5.0+11772+c8e0c271.aa | 2.4.37-41.module+el8.5.0+11772+c8e0c271.aa |
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Reference Links
Frequently Asked Questions
What is the severity of RHSA-2021:4257?
The severity of RHSA-2021:4257 is classified as moderate.
How do I fix RHSA-2021:4257?
To fix RHSA-2021:4257, update the httpd package to version 2.4.37-41.module+el8.5.0+11772+c8e0c271.
What vulnerabilities are addressed in RHSA-2021:4257?
RHSA-2021:4257 addresses vulnerabilities including a NULL pointer dereference in mod_session and unexpected URL matching when 'MergeSlashes' is set to OFF.
Which versions of httpd are affected by RHSA-2021:4257?
Versions of httpd before 2.4.37-41.module+el8.5.0+11772+c8e0c271 are affected by RHSA-2021:4257.
What software packages are related to RHSA-2021:4257?
RHSA-2021:4257 relates to the httpd, httpd-debuginfo, httpd-devel, and related packages.
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