CVE-2023-35945
Envoy is a cloud-native high-performance edge/middle/service proxy.
Impact
Envoy is a cloud-native high-performance edge/middle/service proxy. Envoy’s HTTP/2 codec may leak a header map and bookkeeping structures upon receiving `RST_STREAM` immediately followed by the `GOAWAY` frames from an upstream server. In nghttp2, cleanup of pending requests due to receipt of the `GOAWAY` frame skips de-allocation of the bookkeeping structure and pending compressed header. The error return [code path] is taken if connection is already marked for not sending more requests due to `GOAWAY` frame. The clean-up code is right after the return statement, causing memory leak. Denial of service through memory exhaustion. This vulnerability was patched in versions(s) 1.26.3, 1.25.8, 1.24.9, 1.23.11.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Envoyproxy | Envoy | before 1.23.11 from 1.24.0 before 1.24.9 from 1.25.0 before 1.25.8 from 1.26.0 before 1.26.3 |
| Nghttp2 | Nghttp2 | before 1.55.1 |
Weakness classification
References
- NVD record
- CVE.org record
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-jfxv-29pc-x22r
- https://github.com/nghttp2/nghttp2/blob/e7f59406556c80904b81b593d38508591bb7523a/lib/nghttp2_session.c#L3346
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://cert-portal.siemens.com/productcert/html/ssa-943925.html