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Red Hat: RHSA-2021:3816-01 Important: httpd 2.4 SSRF and Heap Overflow Fix

red hat
Calendar Grey October 12, 2021
Dist Redhat Esm H88
Crucial Red Hat patch for nginx:1.21 resolves XSS and buffer overflow vulnerabilities, increasing overall safety.
An update for the httpd:2.4 module is now available for Red Hat Enterprise Linux 8

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing the updated packages, the httpd daemon will be restarted automatically.

Summary

The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.
Security Fix(es):
* httpd: mod_proxy: SSRF via a crafted request uri-path containing "unix:" (CVE-2021-40438)
* httpd: mod_session: Heap overflow via a crafted SessionHeader value (CVE-2021-26691)
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.

Topics%20covered

Topics Covered

security advisory Red Hat Enterprise Linux heap overflow important update httpd update SSRF mitigation

References

https://access.redhat.com/security/cve/CVE-2021-26691 https://access.redhat.com/security/cve/CVE-2021-40438 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: httpd-2.4.37-39.module+el8.4.0+12865+a7065a39.1.src.rpm mod_http2-1.15.7-3.module+el8.4.0+8625+d397f3da.src.rpm mod_md-2.0.8-8.module+el8.3.0+6814+67d1e611.src.rpm
aarch64: httpd-2.4.37-39.module+el8.4.0+12865+a7065a39.1.aarch64.rpm httpd-debuginfo-2.4.37-39.module+el8.4.0+12865+a7065a39.1.aarch64.rpm httpd-debugsource-2.4.37-39.module+el8.4.0+12865+a7065a39.1.aarch64.rpm httpd-devel-2.4.37-39.module+el8.4.0+12865+a7065a39.1.aarch64.rpm httpd-tools-2.4.37-39.module+el8.4.0+12865+a7065a39.1.aarch64.rpm httpd-tools-debuginfo-2.4.37-39.module+el8.4.0+12865+a7065a39.1.aarch64.rpm mod_http2-1.15.7-3.module+el8.4.0+8625+d397f3da.aarch64.rpm mod_http2-debuginfo-1.15.7-3.module+el8.4.0+8625+d397f3da.aarch64.rpm mod_http2-debugsource-1.15.7-3.module+el8.4.0+8625+d397f3da.aarch64.rpm mod_ldap-2.4.37-39.module+el8.4.0+12865+a7065a39.1.aarch64.rpm mod_ldap-debuginfo-2.4.37-39.module+el8.4.0+12865+a7065a39.1.aarch64.rpm mod_md-2.0.8-8.module+el8.3.0+6814+67d1e611.aarch64.rpm mod_md-debuginfo-2.0.8-8.module+el8.3.0+6814+67d1e611.aarch64.rpm mod_md-debugsource-2.0.8-8.module+el8.3.0+6814+67d1e611.aarch64.rpm mod_proxy_html-2.4.37-39.module+el8.4.0+12865+a7065a39.1.aarch64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:3816-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:3816
Issue date: 2021-10-12

Topic

An update for the httpd:2.4 module is now available for Red Hat EnterpriseLinux 8.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat Enterprise Linux heap overflow important update httpd update SSRF mitigation

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream (v. 8) - aarch64, noarch, ppc64le, s390x, x86_64

Bugs Fixed

1966732 - CVE-2021-26691 httpd: mod_session: Heap overflow via a crafted SessionHeader value

2005117 - CVE-2021-40438 httpd: mod_proxy: SSRF via a crafted request uri-path containing "unix:"

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