by Kastro
Paper/Archive/CVE-2021-21322

CVE-2021-21322

fastify fastify-http-proxy — Prefix escape

EPSS 2%CVSS 10.0
critical.is priorityof 100
45
CVSS 10.0 (CNA)10.0 / 10 × 3030.0Not in CISA KEV+300.0EPSS percentile 76.2.762 × 2015.2No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

fastify-http-proxy is an npm package which is a fastify plugin for proxying your http requests to another server, with hooks. By crafting a specific URL, it is possible to escape the prefix of the proxied backend service. If the base url of the proxied server is `/pub/`, a user expect that accessing `/priv` on the target service would not be possible. In affected versions, it is possible. This is fixed in version 4.3.1.

Affected

ProductAffectedFixed inSource
fastify-http-proxy< 4.3.1–CNA

Scores by source

GitHub_M (CNA)10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

refgithub.com/fastify/fastify-http-proxy/security/advisories/GHSA-c4qr-gmr9-v23wrefnpmjs.com/package/fastify-http-proxyrefgithub.com/fastify/fastify-http-proxy/commit/02d9b43c770aa16bc44470edecfaeb7c17985016