PT-2025-36580 · Bitnami · Envoy
Published
2025-09-04
·
Updated
2025-09-04
None
No severity ratings or metrics are available. When they are, we'll update the corresponding info on the page.
Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. Versions 1.34.0 through 1.34.4 and 1.35.0 contain a use-after-free (UAF) vulnerability in the DNS cache, causing abnormal process termination. The vulnerability is in Envoy's Dynamic Forward Proxy implementation, occurring when a completion callback for a DNS resolution triggers new DNS resolutions or removes existing pending resolutions. This condition may occur when the following conditions are met: dynamic Forwarding Filter is enabled, the
envoy.reloadable features.dfp cluster resolves hosts runtime flag is enabled, and the Host header is modified between the Dynamic Forwarding Filter and Router filters. This issue is resolved in versions 1.34.5 and 1.35.1. To work around this issue, set the envoy.reloadable features.dfp cluster resolves hosts runtime flag to false. Found an issue in the description? Have something to add? Feel free to write us 👾
Related Identifiers
Affected Products
Envoy