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[email protected]CVE-2021-21321

HistoryMar 02, 2021 - 4:15 a.m.

CVE-2021-21321

2021-03-0204:15:12

CWE-20

[email protected]

web.nvd.nist.gov

fastify-reply-from

npm package

vulnerability

security

cve-2021-21321

patch

fix

7.5 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

10 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

9.1 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

60.9%

JSON

fastify-reply-from is an npm package which is a fastify plugin to forward the current http request to another server. In fastify-reply-from before version 4.0.2, 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 4.0.2.

Affected configurations

Vulners

NVD

Node

fastifyreply-fromRange<4.0.2

VendorProductVersionCPE
fastifyreply\-from*cpe:2.3:a:fastify:reply\-from:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
fastify	reply\-from	*	cpe:2.3:a:fastify:reply\-from::::::::

CNA Affected

[
  {
    "product": "fastify-reply-from",
    "vendor": "fastify",
    "versions": [
      {
        "status": "affected",
        "version": "< 4.0.2"
      }
    ]
  }
]