Debian DSA-5570-1: Resolution of nghttp2 Denial of Service Vulnerability

It was discovered that libnghttp2, a library implementing the HTTP/2
protocol, handled request cancellation incorrectly. This could result
in denial of service.

For the oldstable distribution (bullseye), this problem has been fixed
in version 1.43.0-1+deb11u1.

For the stable distribution (bookworm), this problem has been fixed in
version 1.52.0-1+deb12u1.

We recommend that you upgrade your nghttp2 packages.

For the detailed security status of nghttp2 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/nghttp2

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/