New research has found that the CONTINUATION frame in the HTTP/2 protocol can be exploited to conduct denial-of-service (DoS) attacks.
The technique has been codenamed HTTP/2 CONTINUATION Flood by security researcher Bartek Nowotarski, who reported the issue to the CERT Coordination Center (CERT/CC) on January 25, 2024.
"Many HTTP/2 implementations do not properly limit or sanitize the amount of CONTINUATION frames sent within a single stream," CERT/CC said in an advisory on April 3, 2024.
"An attacker that can send packets to a target server can send a stream of CONTINUATION frames that will not be appended to the header list in memory but will still be processed and decoded by the server or will be appended to the header list, causing an out of memory (OOM) crash." Read More..