CVSS 8.3 · High EPSS 66,2%
Kerentanan Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') pada envoyproxy envoy. Skor CVSS 3.1 8.3 (High) menurut NVD.
Envoy is a cloud-native edge/middle/service proxy. Envoy does not decode escaped slash sequences `%2F` and `%5C` in HTTP URL paths in versions 1.18.2 and before. A remote attacker may craft a path with escaped slashes, e.g. `/something%2F..%2Fadmin`, to bypass access control, e.g. a block on `/admin`. A backend server could then decode slash sequences and normalize path and provide an attacker access beyond the scope provided for by the access control policy. ### Impact Escalation of Privileges when using RBAC or JWT filters with enforcement based on URL path. Users with back end servers that interpret `%2F` and `/` and `%5C` and `\` interchangeably are impacted. ### Attack Vector URL paths containing escaped slash characters delivered by untrusted client. Patches in versions 1.18.3, 1.17.3, 1.16.4, 1.15.5 contain new path normalization option to decode escaped slash characters. As a workaround, if back end servers treat `%2F` and `/` and `%5C` and `\` interchangeably and a URL path based access control is configured, one may reconfigure the back end server to not treat `%2F` and `/` and `%5C` and `\` interchangeably.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| envoyproxy | envoy | Semua versi sebelum 1.15.5 |
| envoyproxy | envoy | Versi 1.16.0 hingga sebelum 1.16.4 |
| envoyproxy | envoy | Versi 1.17.0 hingga sebelum 1.17.3 |
| envoyproxy | envoy | Versi 1.18.0 hingga sebelum 1.18.3 |