high7.5
CVE-2019-15226
Upon receiving each incoming request header data, Envoy will iterate over existing request headers to verify that the total size of the headers stays below a m…
Impact
Upon receiving each incoming request header data, Envoy will iterate over existing request headers to verify that the total size of the headers stays below a maximum limit. The implementation in versions 1.10.0 through 1.11.1 for HTTP/1.x traffic and all versions of Envoy for HTTP/2 traffic had O(n^2) performance characteristics. A remote attacker may craft a request that stays below the maximum request header size but consists of many thousands of small headers to consume CPU and result in a denial-of-service attack.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Envoyproxy | Envoy | Versions 1.0.0, 1.1.0, 1.2.0, 1.3.0, 1.4.0, 1.5.0 |
Weakness classification
References
- NVD record
- CVE.org record
- https://github.com/envoyproxy/envoy/commit/afc39bea36fd436e54262f150c009e8d72db5014
- https://github.com/envoyproxy/envoy/commits/master
- https://github.com/envoyproxy/envoy/issues/8520
- https://github.com/envoyproxy/envoy/commit/afc39bea36fd436e54262f150c009e8d72db5014
- https://github.com/envoyproxy/envoy/commits/master
- https://github.com/envoyproxy/envoy/issues/8520