VULNERABILITY

FreeBSD: VID-89C668D5-2F80-11F0-9632-641C67A117D8: www/varnish7 -- Request Smuggling Attack

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FreeBSD: VID-89C668D5-2F80-11F0-9632-641C67A117D8: www/varnish7 -- Request Smuggling Attack

Severity
9
CVSS
(AV:N/AC:M/Au:N/C:N/I:C/A:C)
Published
05/12/2025
Created
05/16/2025
Added
05/14/2025
Modified
05/22/2025

Description

The Varnish Development Team reports:

A client-side desync vulnerability can be triggered in Varnish Cache

and Varnish Enterprise. This vulnerability can be triggered under

specific circumstances involving malformed HTTP/1 requests.

An attacker can abuse a flaw in Varnish's handling of chunked

transfer encoding which allows certain malformed HTTP/1 requests

to exploit improper framing of the message body to smuggle additional

requests. Specifically, Varnish incorrectly permits CRLF to be

skipped to delimit chunk boundaries.

Solution(s)

  • freebsd-upgrade-package-varnish7

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