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CVE-2019-14243

HIGH
7.5
CVSS Score
Published: July 23, 2019 at 09:38 PM UTC
Updated: June 17, 2026 at 02:18 AM UTC
1 product affected across 1 vendorProxyprotocol

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Severity
HIGH7.5
Exploit prediction
EPSS 4%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Proxyprotocol· Haproxy
95%
v < 0.0.2
Affected range stops below 0.0.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (6)

x_refsource_MISCThird Party Advisory
Source: [email protected]
https://caddy.community/t/dos-in-http-proxyprotocol-plugin/6014
x_refsource_MISCIssue TrackingThird Party Advisory
Source: [email protected]
https://github.com/mastercactapus/caddy-proxyprotocol/issues/8
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/mastercactapus/proxyprotocol/commit/5c4a101121fc3e868026189c7a73f7f19eef90ac
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://github.com/mastercactapus/proxyprotocol/compare/ef496d7...5c4a101
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://github.com/mastercactapus/proxyprotocol/issues/1
x_refsource_MISCRelease NotesThird Party Advisory
Source: [email protected]
https://github.com/mastercactapus/proxyprotocol/releases/tag/v0.0.2

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20

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