Red Hat Enhancement Advisory: Release of AWS Load Balancer Operator 1.0.1 on OperatorHub
🔗 CVE IDs covered (1)
📋 Description
CVE-2023-44487 — HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack)
🎯 Affected products4
- AWS-LB-OPTR 1.0 for RHEL 8
- albo/aws-load-balancer-controller-rhel8@sha256:b018dcf96060a4b00d6b2fead7299088a2a3c216cfd191ca2c67b2828d128091_amd64 as a component of AWS-LB-OPTR 1.0 for RHEL 8
- albo/aws-load-balancer-operator-bundle@sha256:59ff4966f4f653e49d42d97bfed6351d3730128db74f666ee4ecacff11790baf_amd64 as a component of AWS-LB-OPTR 1.0 for RHEL 8
- albo/aws-load-balancer-rhel8-operator@sha256:4d7768bfcfa32082506f5de5978d9c3d4bc9961950b19e8c9b87947f27090e45_amd64 as a component of AWS-LB-OPTR 1.0 for RHEL 8
✅ Remediation
OpenShift AWS Load Balancer Operator 1.0.1 Release Workaround: Users are strongly urged to update their software as soon as fixes are available. There are several mitigation approaches for this flaw. 1. If circumstances permit, users may disable http2 endpoints to circumvent the flaw altogether until a fix is available. 2. IP-based blocking or flood protection and rate control tools may be used at network endpoints to filter incoming traffic. 3. Several package specific mitigations are also available. a. nginx: https://www.nginx.com/blog/http-2-rapid-reset-attack-impacting-f5-nginx-products/ b. netty: https://github.com/netty/netty/security/advisories/GHSA-xpw8-rcwv-8f8p c. haproxy: https://www.haproxy.com/blog/haproxy-is-not-affected-by-the-http-2-rapid-reset-attack-cve-2023-44487 d. nghttp2: https://github.com/nghttp2/nghttp2/security/advisories/GHSA-vx74-f528-fxqg e. golang: The default stream concurrency limit in golang is 250 streams (requests) per HTTP/2 connection. This value may be adjusted in the golang.org/x/net/http2 package using the Server.MaxConcurrentStreams setting and the ConfigureServer function which are available in golang.org/x/net/http2.