CVE-2019-14243 : headerv2.go in mastercactapus proxyprotocol before 0.0.2, as used in the masterc

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.

Published 2019-07-23 22:15:12

Updated 2019-12-16 17:45:36

Source MITRE

View at NVD, CVE.org

Vulnerability category: Input validationDenial of service

Products affected by CVE-2019-14243

Haproxy » Proxyprotocol » For Caddy
Versions before (<) 0.0.2
cpe:2.3:a:haproxy:proxyprotocol:*:*:*:*:*:caddy:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2019-14243

EPSS FAQ

3.66%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 92 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2019-14243

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:N/A:P	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2019-14243

CWE-20 Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2019-14243

https://github.com/mastercactapus/proxyprotocol/compare/ef496d7...5c4a101

Comparing ef496d7...5c4a101 · mastercactapus/proxyprotocol · GitHub
Third Party Advisory
https://github.com/mastercactapus/proxyprotocol/issues/1

Invalid V2 PROXY data causes parsing panics/denial-of-service · Issue #1 · mastercactapus/proxyprotocol · GitHub
Exploit;Third Party Advisory
https://github.com/mastercactapus/proxyprotocol/releases/tag/v0.0.2

Release v0.0.2 · mastercactapus/proxyprotocol · GitHub
Release Notes;Third Party Advisory
https://github.com/mastercactapus/proxyprotocol/commit/5c4a101121fc3e868026189c7a73f7f19eef90ac

Add test and fix for malformed/truncated header · mastercactapus/proxyprotocol@5c4a101 · GitHub
Patch;Third Party Advisory
https://github.com/mastercactapus/caddy-proxyprotocol/issues/8

Denial of service vulnerability with invalid v2 PROXY data · Issue #8 · mastercactapus/caddy-proxyprotocol · GitHub
Issue Tracking;Third Party Advisory
https://caddy.community/t/dos-in-http-proxyprotocol-plugin/6014

DoS in http.proxyprotocol plugin - Plugins - Caddy Community
Third Party Advisory

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Vulnerability Details : CVE-2019-14243

Products affected by CVE-2019-14243

Exploit prediction scoring system (EPSS) score for CVE-2019-14243

CVSS scores for CVE-2019-14243

CWE ids for CVE-2019-14243

References for CVE-2019-14243