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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database

Vulnerability Change Records for CVE-2023-50247

Change History

New CVE Received by NIST 12/12/2023 3:15:08 PM

Action Type Old Value New Value
Added CVSS V3.1 

								
							
							
								
							
						
								
							
								
GitHub, Inc. AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

								
								
					

					

						Added
						CWE
						
							
							
								
							
								

								
							
							
								
							
						
								
							
								
GitHub, Inc. CWE-770

								
								
					

					

						Added
						Description
						
							
							
								
							
								

								
							
							
								
							
						
								
							
								
h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. The QUIC stack (quicly), as used by H2O up to commit 43f86e5 (in version 2.3.0-beta and prior), is susceptible to a state exhaustion attack. When H2O is serving HTTP/3, a remote attacker can exploit this vulnerability to progressively increase the memory retained by the QUIC stack. This can eventually cause H2O to abort due to memory exhaustion. The vulnerability has been resolved in commit d67e81d03be12a9d53dc8271af6530f40164cd35. HTTP/1 and HTTP/2 are not affected by this vulnerability as they do not use QUIC. Administrators looking to mitigate this issue without upgrading can disable HTTP/3 support.

								
								
					

					

						Added
						Reference
						
							
							
								
							
								

								
							
							
								
							
						
								
							
								
GitHub, Inc. https://github.com/h2o/h2o/commit/d67e81d03be12a9d53dc8271af6530f40164cd35 [No types assigned]

								
								
					

					

						Added
						Reference
						
							
							
								
							
								

								
							
							
								
							
						
								
							
								
GitHub, Inc. https://github.com/h2o/h2o/security/advisories/GHSA-2ch5-p59c-7mv6 [No types assigned]