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High 1 exploited CVE RLSA-2021:3816 2 CVEs

Important: httpd:2.4 security update

Published Oct 12, 2021 · Updated Feb 4, 2026

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.

Fixed packages 5

ReleasePackageFixed in
Rocky Linux · 8 httpd 0:2.4.37-39.module+el8.4.0+571+fd70afb1
Rocky Linux · 8 mod_http2 0:1.15.7-3.module+el8.4.0+553+7a69454b
Rocky Linux · 8 mod_http2 0:1.15.7-3.module+el8.5.0+695+1fa8055e
Rocky Linux · 8 mod_md 1:2.0.8-8.module+el8.5.0+695+1fa8055e
Rocky Linux · 8 mod_md 1:2.0.8-8.module+el8.4.0+553+7a69454b

Vulnerabilities 2

References

  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=1966732
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2005117