|Related CVEs||CVE-2021-34798 CVE-2021-39275 CVE-2021-40438|
Several vulnerabilities were discovered in the Apache HTTP server. An attacker could send proxied requests to arbitrary servers, corrupt memory in some setups involving third-party modules, and cause the server to crash.
Malformed requests may cause the server to dereference a NULL pointer.
ap_escape_quotes() may write beyond the end of a buffer when given malicious input. No included modules pass untrusted data to these functions, but third-party / external modules may.
A crafted request uri-path can cause mod_proxy to forward the request to an origin server choosen by the remote user.
For Debian 8 jessie, these problems have been fixed in version 2.4.10-10+deb8u19.
We recommend that you upgrade your apache2 packages.
Further information about Extended LTS security advisories can be found at: https://deb.freexian.com/extended-lts/