cve-2024-30255
Vulnerability from cvelistv5
Published
2024-04-04 19:41
Modified
2025-02-13 17:47
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Summary
Envoy is a cloud-native, open source edge and service proxy. The HTTP/2 protocol stack in Envoy versions prior to 1.29.3, 1.28.2, 1.27.4, and 1.26.8 are vulnerable to CPU exhaustion due to flood of CONTINUATION frames. Envoy's HTTP/2 codec allows the client to send an unlimited number of CONTINUATION frames even after exceeding Envoy's header map limits. This allows an attacker to send a sequence of CONTINUATION frames without the END_HEADERS bit set causing CPU utilization, consuming approximately 1 core per 300Mbit/s of traffic and culminating in denial of service through CPU exhaustion. Users should upgrade to version 1.29.3, 1.28.2, 1.27.4, or 1.26.8 to mitigate the effects of the CONTINUATION flood. As a workaround, disable HTTP/2 protocol for downstream connections.
References
security-advisories@github.comhttp://www.openwall.com/lists/oss-security/2024/04/03/16
security-advisories@github.comhttp://www.openwall.com/lists/oss-security/2024/04/05/3
security-advisories@github.comhttps://github.com/envoyproxy/envoy/security/advisories/GHSA-j654-3ccm-vfmm
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2024/04/03/16
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2024/04/05/3
af854a3a-2127-422b-91ae-364da2661108https://github.com/envoyproxy/envoy/security/advisories/GHSA-j654-3ccm-vfmm
Impacted products
Vendor Product Version
envoyproxy envoy Version: >= 1.29.0, < 1.29.3
Version: >= 1.28.0, < 1.28.2
Version: >= 1.27.0, < 1.27.4
Version: < 1.26.8
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{
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