TI-2018-04667 Aliases CVE-2018-6343 GHSA-php7-7869-j4qf

NULL pointer dereference in Meta Proxygen

MEDIUM 40CWE-476Published 2018-12-31 · Updated 2025-05-06

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-476.

Summary

Proxygen fails to validate that a secondary auth manager is set before dereferencing it. That can cause a denial of service issue when parsing a Certificate/CertificateRequest HTTP2 Frame over a fizz (TLS 1.3) transport. This issue affects Proxygen releases starting from v2018.10.29.00 until the fix in v2018.11.19.00.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00834 57th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Meta	Proxygen	v2018.11.19.00; v2018.10.29.00 and later	—	No fix listed	CNA

Proxygen VendorMeta Affected v2018.11.19.00; v2018.10.29.00 and later Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:facebook:proxygen::::::::	2018.10.29.00 to before 2018.11.19.00	Vulnerable	Meta

cpe:2.3:a:facebook:proxygen:*:*:*:*:*:*:*:* Versions 2018.10.29.00 to before 2018.11.19.00 Vulnerable ·Meta

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2018-6343
2026-10-03 Alias added: GHSA-php7-7869-j4qf

References

Patch 1

https://github.com/facebook/proxygen/commit/0600ebe59c3e82cd012def77ca9ca1918da74a71

TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
TI-2019-08926 Out-of-bounds write in Meta Proxygen CVSS 3.0CRITICAL 9.8
TI-2019-08945 Use after free in Meta Proxygen CVSS 3.1CRITICAL 9.8
TI-2020-01824 Use after free in Meta proxygen CVSS 3.1CRITICAL 9.8
TI-2021-06346 Reachable assertion in Meta mvfst CVSS 3.1HIGH 7.5
TI-2025-34860 Sending an HTTP request/response body with greater than 2^31 bytes triggers an infinite… CVSS 3.1MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences