漏洞信息
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Vulnerability Title
Envoy vulnerable to HTTP/2 memory exhaustion via cookie header size bypass and HPACK amplification
Vulnerability Description
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.35.11, 1.36.7, 1.37.3, and 1.38.1, a vulnerability in Envoy's HTTP/2 downstream request processing allows an unauthenticated remote client to trigger excessive memory consumption, potentially resulting in OOM termination of the Envoy process and denial of service. The issue arises from the combination of two behaviors. First, cookie header bytes are not fully accounted for during request header size validation in Envoy. Second, HPACK header block limits in oghttp2/quiche are enforced on encoded bytes without a corresponding limit on total decoded header size. Together, these behaviors allow a malicious client to cause large decoded header allocations while bypassing the intended request header size protections. Versions 1.35.11, 1.36.7, 1.37.3, and 1.38.1 contain a fix. No complete workaround is known short of applying a fix. Possible temporary mitigations include disabling downstream HTTP/2 where operationally feasible; enforcing stricter request header and cookie limits before traffic reaches Envoy; and monitoring Envoy memory usage for abnormal growth under HTTP/2 traffic.
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vulnerability Type
不对称的资源消耗(放大攻击)
Vulnerability Title
envoyproxy Envoy 资源管理错误漏洞
Vulnerability Description
envoyproxy Envoy是envoyproxy组织开源的一个分布式代理服务器。 envoyproxy Envoy存在资源管理错误漏洞,该漏洞源于HTTP/2下游请求处理中cookie标头字节在请求标头大小验证时未完全计算以及HPACK编码字节限制与解码后总大小限制缺失,可能导致未经身份验证的远程客户端触发过量内存消耗,造成OOM终止和拒绝服务。以下版本受到影响:1.35.11之前版本、1.36.0至1.36.7之前版本、1.37.0至1.37.3之前版本和1.38.0至1.38.1之前版本。
CVSS Information
N/A
Vulnerability Type
N/A