CVE-2024-2653: AMPHP Denial of Service via HTTP/2 CONTINUATION Frames

April 3, 2024

amphp/http will collect HTTP/2 CONTINUATION frames in an unbounded buffer and will not check the header size limit until it has received the END_HEADERS flag, resulting in an OOM crash. amphp/http-client and amphp/http-server are indirectly affected if they’re used with an unpatched version of amphp/http. Early versions of amphp/http-client with HTTP/2 support (v4.0.0-rc10 to 4.0.0) are also directly affected.

References

github.com/advisories/GHSA-qjfw-cvjf-f4fm
github.com/amphp/http
github.com/amphp/http/commit/3a33e68a3b53f7279217238e89748cf0cb30b8a6
github.com/amphp/http/commit/881cc33da236fbcd0cb0cf6c2bfc7efcf80ede76
github.com/amphp/http/security/advisories/GHSA-qjfw-cvjf-f4fm
nvd.nist.gov/vuln/detail/CVE-2024-2653

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