Important: httpd

Issue Overview:

A null pointer de-reference was found in the way httpd handled specially crafted HTTP/2 request. A remote attacker could use this flaw to crash the httpd child process, causing temporary denial of service. (CVE-2021-31618)

Affected Packages:

httpd

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update httpd to update your system.

New Packages:

aarch64:  
    httpd-2.4.46-2.amzn2.aarch64  
    httpd-devel-2.4.46-2.amzn2.aarch64  
    httpd-tools-2.4.46-2.amzn2.aarch64  
    mod_ssl-2.4.46-2.amzn2.aarch64  
    mod_md-2.4.46-2.amzn2.aarch64  
    mod_proxy_html-2.4.46-2.amzn2.aarch64  
    mod_ldap-2.4.46-2.amzn2.aarch64  
    mod_session-2.4.46-2.amzn2.aarch64  
    httpd-debuginfo-2.4.46-2.amzn2.aarch64  
  
i686:  
    httpd-2.4.46-2.amzn2.i686  
    httpd-devel-2.4.46-2.amzn2.i686  
    httpd-tools-2.4.46-2.amzn2.i686  
    mod_ssl-2.4.46-2.amzn2.i686  
    mod_md-2.4.46-2.amzn2.i686  
    mod_proxy_html-2.4.46-2.amzn2.i686  
    mod_ldap-2.4.46-2.amzn2.i686  
    mod_session-2.4.46-2.amzn2.i686  
    httpd-debuginfo-2.4.46-2.amzn2.i686  
  
noarch:  
    httpd-manual-2.4.46-2.amzn2.noarch  
    httpd-filesystem-2.4.46-2.amzn2.noarch  
  
src:  
    httpd-2.4.46-2.amzn2.src  
  
x86_64:  
    httpd-2.4.46-2.amzn2.x86_64  
    httpd-devel-2.4.46-2.amzn2.x86_64  
    httpd-tools-2.4.46-2.amzn2.x86_64  
    mod_ssl-2.4.46-2.amzn2.x86_64  
    mod_md-2.4.46-2.amzn2.x86_64  
    mod_proxy_html-2.4.46-2.amzn2.x86_64  
    mod_ldap-2.4.46-2.amzn2.x86_64  
    mod_session-2.4.46-2.amzn2.x86_64  
    httpd-debuginfo-2.4.46-2.amzn2.x86_64  

Additional References

Red Hat: CVE-2021-31618

Mitre: CVE-2021-31618