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Test your applicationsUpgrade Debian:unstable
apache2
to version 2.4.64-1 or higher.
Note: Versions mentioned in the description apply only to the upstream apache2
package and not the apache2
package as distributed by Debian
.
See How to fix?
for Debian:unstable
relevant fixed versions and status.
In certain proxy configurations, a denial of service attack against Apache HTTP Server versions 2.4.26 through to 2.4.63 can be triggered by untrusted clients causing an assertion in mod_proxy_http2.
Configurations affected are a reverse proxy is configured for an HTTP/2 backend, with ProxyPreserveHost set to "on".