BSD Portswww/varnish7 -- Denial of Service in HTTP/2
Varnish Development Team reports: A denial of service attack can be performed on Varnish Cache servers that have the HTTP/2 protocol turned on. An attacker can create a large number of streams and immediately reset them without ever reaching the maximum number of concurrent streams allowed for the session, causing the Varnish server to consume unnecessary resources processing requests for which the response will not …
Affected versions
- varnish7 < 7.7.2
By system
1 still vulnerable, 1 fixed. Where VuXML applies (FreeBSD, DragonFly, FreeBSD's derivatives) a port is vulnerable while its version is in a range; pkgsrc says itself whether it lists a CVE of this advisory; OpenBSD and MidnightBSD keep no list this site reads, so their row is only an estimate: FreeBSD's ranges applied to upstream's version.
| System | Port | Version | State | Fixed |
|---|---|---|---|---|
| DragonFly | www/varnish7 | 7.6.2 | vulnerable since 2025-08-13 | |
| MidnightBSD | www/varnish7 | 7.7.3 | out of range, by version | |
| FreeBSD | www/varnish7 | 7.7.3_1 | fixed |