Description
headerv2.go in mastercactapus proxyprotocol before 0.0.2, as used in the mastercactapus caddy-proxyprotocol plugin through 0.0.2 for Caddy, allows remote attackers to cause a denial of service (webserver panic and daemon crash) via a crafted HAProxy PROXY v2 request with truncated source/destination address data.
References (6)
Core 6
Core References
Third Party Advisory x_refsource_misc
https://caddy.community/t/dos-in-http-proxyprotocol-plugin/6014
Exploit, Third Party Advisory x_refsource_misc
https://github.com/mastercactapus/proxyprotocol/issues/1
Issue Tracking, Third Party Advisory x_refsource_misc
https://github.com/mastercactapus/caddy-proxyprotocol/issues/8
Third Party Advisory x_refsource_misc
https://github.com/mastercactapus/proxyprotocol/compare/ef496d7...5c4a101
Patch, Third Party Advisory x_refsource_misc
https://github.com/mastercactapus/proxyprotocol/commit/5c4a101121fc3e868026189c7a73f7f19eef90ac
Release Notes, Third Party Advisory x_refsource_misc
https://github.com/mastercactapus/proxyprotocol/releases/tag/v0.0.2
Scores
CVSS v3
7.5
EPSS
0.0430
EPSS Percentile
89.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-20
Status
published
Products (2)
haproxy/proxyprotocol
< 0.0.2
mastercactapus/proxyprotocol
0 - 0.0.2Go
Published
Jul 23, 2019
Tracked Since
Feb 18, 2026