CVE-2021-24029

Published: Mar 15, 2021Modified: Jun 17, 2026

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability: 3.9 / Impact: 3.6

Source: NVD

Description

A packet of death scenario is possible in mvfst via a specially crafted message during a QUIC session, which causes a crash via a failed assertion. Per QUIC specification, this particular message should be treated as a connection error. This issue affects mvfst versions prior to commit a67083ff4b8dcbb7ee2839da6338032030d712b0 and proxygen versions prior to v2021.03.15.00.

Affected (2)

Products: Facebook: Mvfst, Proxygen

2 products

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Facebook Mvfst	Before 2021-03-13
Facebook Proxygen	Before 2021.03.15.00

Related CWEs

Reachable Assertion

The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.

References (4)

https://github.com/facebookincubator/mvfst/commit/a67083ff4b8dcbb7ee2839da6338032030d712b0

Source: cve-assign@fb.com

PatchThird Party Advisory

https://www.facebook.com/security/advisories/cve-2021-24029

Source: cve-assign@fb.com

Vendor Advisory

https://github.com/facebookincubator/mvfst/commit/a67083ff4b8dcbb7ee2839da6338032030d712b0

Source: af854a3a-2127-422b-91ae-364da2661108

PatchThird Party Advisory

https://www.facebook.com/security/advisories/cve-2021-24029

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

Timeline

No history available yet.