Important: httpd

Issue Overview:

There’s a null pointer dereference and server-side request forgery flaw in httpd’s mod_proxy module, when it is configured to be used as a forward proxy. A crafted packet could be sent on the adjacent network to the forward proxy that could cause a crash, or potentially SSRF via misdirected Unix Domain Socket requests. In the worst case, this could cause a denial of service or compromise to confidentiality of data. (CVE-2021-44224)

A buffer overflow flaw in httpd’s lua module could allow an out-of-bounds write. An attacker who is able to submit a crafted request to an httpd instance that is using the lua module may be able to cause an impact to confidentiality, integrity, and/or availability. (CVE-2021-44790)

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-2.4.52-1.amzn2.aarch64  
    httpd-devel-2.4.52-1.amzn2.aarch64  
    httpd-tools-2.4.52-1.amzn2.aarch64  
    mod_ssl-2.4.52-1.amzn2.aarch64  
    mod_md-2.4.52-1.amzn2.aarch64  
    mod_proxy_html-2.4.52-1.amzn2.aarch64  
    mod_ldap-2.4.52-1.amzn2.aarch64  
    mod_session-2.4.52-1.amzn2.aarch64  
    httpd-debuginfo-2.4.52-1.amzn2.aarch64  
  
i686:  
    httpd-2.4.52-1.amzn2.i686  
    httpd-devel-2.4.52-1.amzn2.i686  
    httpd-tools-2.4.52-1.amzn2.i686  
    mod_ssl-2.4.52-1.amzn2.i686  
    mod_md-2.4.52-1.amzn2.i686  
    mod_proxy_html-2.4.52-1.amzn2.i686  
    mod_ldap-2.4.52-1.amzn2.i686  
    mod_session-2.4.52-1.amzn2.i686  
    httpd-debuginfo-2.4.52-1.amzn2.i686  
  
noarch:  
    httpd-manual-2.4.52-1.amzn2.noarch  
    httpd-filesystem-2.4.52-1.amzn2.noarch  
  
src:  
    httpd-2.4.52-1.amzn2.src  
  
x86_64:  
    httpd-2.4.52-1.amzn2.x86_64  
    httpd-devel-2.4.52-1.amzn2.x86_64  
    httpd-tools-2.4.52-1.amzn2.x86_64  
    mod_ssl-2.4.52-1.amzn2.x86_64  
    mod_md-2.4.52-1.amzn2.x86_64  
    mod_proxy_html-2.4.52-1.amzn2.x86_64  
    mod_ldap-2.4.52-1.amzn2.x86_64  
    mod_session-2.4.52-1.amzn2.x86_64  
    httpd-debuginfo-2.4.52-1.amzn2.x86_64  

Additional References

Red Hat: CVE-2021-44224, CVE-2021-44790

Mitre: CVE-2021-44224, CVE-2021-44790