Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Envoyproxy | Envoy | < 1.23.11 |
| Nghttp2 | Nghttp2 | < 1.55.1 |
Related Weaknesses (CWE)
References
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-jfxv-29pc-x22rVendor Advisory
- https://github.com/nghttp2/nghttp2/blob/e7f59406556c80904b81b593d38508591bb7523aProduct
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-jfxv-29pc-x22rVendor Advisory
- https://github.com/nghttp2/nghttp2/blob/e7f59406556c80904b81b593d38508591bb7523aProduct
FAQ
What is CVE-2023-35945?
CVE-2023-35945 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 `GOAWA...
How severe is CVE-2023-35945?
CVE-2023-35945 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-35945?
Check the references section above for vendor advisories and patch information. Affected products include: Envoyproxy Envoy, Nghttp2 Nghttp2.