CVE-2019-14243 — headerv2
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 truncate
Published
2019-07-23T21:38:14.000Z
Last modified
2024-08-05T00:12:43.432Z
01What is this vulnerability?
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.
02Affected products
| Vendor | Product | Versions |
|---|
| n | a / n/a | n/a |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2019-07-23T21:38:14.000Z
- Last modified: 2024-08-05T00:12:43.432Z
09References
- caddy.community — https://caddy.community/t/dos-in-http-proxyprotocol-plugin/6014
- github.com — https://github.com/mastercactapus/proxyprotocol/issues/1
- github.com — https://github.com/mastercactapus/caddy-proxyprotocol/issues/8
- github.com — https://github.com/mastercactapus/proxyprotocol/compare/ef496d7...5c4a101
- github.com — https://github.com/mastercactapus/proxyprotocol/commit/5c4a101121fc3e868026189c7…
- github.com — https://github.com/mastercactapus/proxyprotocol/releases/tag/v0.0.2
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