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No exploitation reportedFix available

CVE-2019-14243

No exploitation reported by the sources we read.

  • Published2019-07-23
  • Fixed in0.0.2
  • WeaknessCWE-20

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2019-07-2322:15CVE publishedNVD

Versions per branch

NVD · OSV
Haproxy proxyprotocol
BranchAffectedFixed in
0.0< 0.0.20.0.2

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Haproxy proxyprotocol to 0.0.2

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2019-07-23
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-85c5-ccm8-vr96

Frequently asked questions

What is CVE-2019-14243?

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.

Is CVE-2019-14243 actively exploited?

Active exploitation of CVE-2019-14243 has not been confirmed. Its EPSS score was 4.3% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-14243?

CVE-2019-14243 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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