{"id":"AZL-39274","summary":"CVE-2023-45288 affecting package nmi for versions less than 1.8.17-2","details":"An attacker may cause an HTTP/2 endpoint to read arbitrary amounts of header data by sending an excessive number of CONTINUATION frames. Maintaining HPACK state requires parsing and processing all HEADERS and CONTINUATION frames on a connection. When a request's headers exceed MaxHeaderBytes, no memory is allocated to store the excess headers, but they are still parsed. This permits an attacker to cause an HTTP/2 endpoint to read arbitrary amounts of header data, all associated with a request which is going to be rejected. These headers can include Huffman-encoded data which is significantly more expensive for the receiver to decode than for an attacker to send. The fix sets a limit on the amount of excess header frames we will process before closing a connection.","modified":"2026-04-01T05:13:25.145360Z","published":"2024-04-04T21:15:16Z","upstream":["CVE-2023-45288"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-45288"}],"affected":[{"package":{"name":"nmi","ecosystem":"Azure Linux:2","purl":"pkg:rpm/azure-linux/nmi"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.17-2"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-39274.json"}}],"schema_version":"1.7.5"}