RHSA-2023:6305HighCVSS 7.5

Red Hat Security Advisory: Migration Toolkit for Applications security update

Published
November 6, 2023
Last Modified
August 24, 2026

🔗 CVE IDs covered (3)

CVE-2023-44487 →CVE-2023-0482 →CVE-2023-39325 →

📋 Description

CVE-2023-0482 — RESTEasy: creation of insecure temp files CVE-2023-39325 — golang: net/http, x/net/http2: rapid stream resets can cause excessive work (CVE-2023-44487) CVE-2023-44487 — HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack)

🎯 Affected products7

  • MTA 6.1 for RHEL 8
  • mta/mta-hub-rhel8@sha256:5dddb8ad78fd32ea95f0cecefefe23df5f91947e4ecf91545904a41d587d5f9c_amd64 as a component of MTA 6.1 for RHEL 8
  • mta/mta-operator-bundle@sha256:f3d585e24d65905b2e9f594dcdb67721aa95057ab7587ae531c3487aa2f94e53_amd64 as a component of MTA 6.1 for RHEL 8
  • mta/mta-pathfinder-rhel8@sha256:e3abb9fce799c8b59e2001fa06b186fecce9f8d19d4987e3ce16ba2325f0ad00_amd64 as a component of MTA 6.1 for RHEL 8
  • mta/mta-rhel8-operator@sha256:3ec660105a8b02d46e6b0fb33293f5dc8e8c628b9a0487b261e7c6c811152f55_amd64 as a component of MTA 6.1 for RHEL 8
  • mta/mta-ui-rhel8@sha256:c3b75025b98012483cd5d7fc3b1e2b747e6c78782e99736522b9cdbf220f5841_amd64 as a component of MTA 6.1 for RHEL 8
  • mta/mta-windup-addon-rhel8@sha256:569e41225942bc8bebaa2d4becb83254ab5ca290363a18d186754fc7f039e95a_amd64 as a component of MTA 6.1 for RHEL 8

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: 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. 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.

🔗 References (6)