High severity · published Dec 31, 2018
CVE-2018-6343
Proxygen fails to validate that a secondary auth manager is set before dereferencing it
7.5
CVSS
0.8%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 57% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PR
Proxygen · Facebook
2018.10.29.00 before 2018.11.19.00 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-6343
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-6343
Patch
https://github.com/facebook/proxygen/commit/0600ebe59c3e82cd012def77ca9ca1918da74a71
More from Proxygen
7.5
CVE-2023-44487
HTTP/2 Rapid Reset Attack Vulnerability
9.8
CVE-2020-1897
A use-after-free is possible due to an error in lifetime management in the request adaptor when a malicious client invokes request error handling in a specific sequence
9.8
CVE-2019-11940
In the course of decompressing HPACK inside the HTTP2 protocol, an unexpected sequence of header table resize operations can place the header table into a corrupted state, leading…
9.8
CVE-2019-11921
An out of bounds write is possible via a specially crafted packet in certain configurations of Proxygen due to improper handling of Base64 when parsing malformed binary content in…
7.5
CVE-2026-91096
In proxygen from v2024.10.28.00 until v2026.09.28.00, WebTransportImpl::terminateSessionStreams (WebTransportImpl::destroy in releases before v2025.08.18.00) failed to unregister…