CVE-2024-30255
Description
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.
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Affected products
4cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*range: <1.26.8
- (no CPE)range: <=1.26.7, <=1.27.3, <=1.28.1, <=1.29.2
- (no CPE)range: >= 1.29.0, < 1.29.3
Patches
Vulnerability mechanics
References
4- github.com/envoyproxy/envoy/security/advisories/GHSA-j654-3ccm-vfmmnvdPatchThird Party Advisory
- www.openwall.com/lists/oss-security/2024/04/03/16nvdMailing ListThird Party Advisory
- www.openwall.com/lists/oss-security/2024/04/05/3nvdMailing List
- www.kb.cert.org/vuls/id/421644nvd
News mentions
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