Debian Security Advisory DSA-4960-1 haproxy


Debian security advisory DSA-4960-1 haproxy.

Several vulnerabilities were discovered in HAProxy, a fast and reliable load balancing reverse proxy.

Debian security advisory DSA-4960-1 haproxy.

Package: haproxy
CVE ID: not yet assigned

Several vulnerabilities were discovered in HAProxy, a fast and reliable load balancing reverse proxy, which can result in HTTP request smuggling. By carefully crafting HTTP/2 requests, it is possible to smuggle another HTTP request to the backend selected by the HTTP/2 request. With certain configurations, it allows an attacker to send an HTTP request to a backend, circumventing the backend selection logic.

Known workarounds are to disable HTTP/2 and set
"tune.h2.max-concurrent-streams" to 0 in the "global" section.

        tune.h2.max-concurrent-streams 0

For the stable distribution Debian 11 "Bullseye", these problems have been fixed in version 2.2.9-2+deb11u1.

We recommend that you upgrade your haproxy packages.

For the detailed security status of haproxy please refer to its security tracker page.

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