CVE-2021-43795 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in com.linecorp.armeria:armeria

2021-12-0218:00:11

CWE-22

GitHub_M

www.cve.org

armeria microservice framework

path traversal

cve-2021-43795

http request

hardened path validation logic

additional validation

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

EPSS

0.002

Percentile

56.0%

JSON

Armeria is an open source microservice framework. In affected versions an attacker can access an Armeria server’s local file system beyond its restricted directory by sending an HTTP request whose path contains %2F (encoded /), such as /files/..%2Fsecrets.txt, bypassing Armeria’s path validation logic. Armeria 1.13.4 or above contains the hardened path validation logic that handles %2F properly. This vulnerability can be worked around by inserting a decorator that performs an additional validation on the request path.

CNA Affected

[
  {
    "product": "armeria",
    "vendor": "line",
    "versions": [
      {
        "status": "affected",
        "version": "< 1.13.4"
      }
    ]
  }
]