The Apache Software Foundation has released the Apache HTTP Server 2.4.52 to address a couple of vulnerabilities, tracked as CVE-2021-44790 and CVE-2021-44224, that can lead to remote code execution attacks.
The CVE-2021-44790 is a possible buffer overflow when parsing multipart content in mod_lua of Apache HTTP Server 2.4.51 and earlier. The Apache httpd team is not aware of attacks in the wild exploiting this vulnerability.
“A carefully crafted request body can cause a buffer overflow in the mod_lua multipart parser (r:parsebody() called from Lua scripts).” reads the advisory published by the foundation.
The second flaw, tracked as CVE-2021-44224, is a possible NULL dereference or SSRF in forward proxy configurations in Apache HTTP Server 2.4.51 and earlier.
“A crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL pointer dereference) or, for configurations mixing forward and reverse proxy declarations, can allow for requests to be directed to a declared Unix Domain Socket endpoint (Server Side Request Forgery).” continues the advisory.
The Apache httpd team is not aware of an exploit for the vulnerability though it might be possible to craft one.
US CISA recommends users and administrators review the Apache announcement and update their installs as soon as possible.
“The Apache Software Foundation has released Apache HTTP Server 2.4.52. This version addresses vulnerabilities—CVE-2021-44790 and CVE-2021-44224—one of which may allow a remote attacker to take control of an affected system.” reads the advisory published by CISA.
In November, Germany’s Federal Office for Information Security (BSI) and Cisco warned threat actors are exploiting another server-side request forgery (SSRF) vulnerability, tracked as CVE-2021-40438, in HTTP servers.
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(SecurityAffairs – hacking, Apache)