Vulnerability CVE-2021-43795


Published: 2021-12-02

Description:
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.

Type:

CWE-22

(Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'))

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Linecorp -> Armeria 

 References:
https://github.com/line/armeria/pull/3855
https://github.com/line/armeria/commit/e2697a575e9df6692b423e02d731f293c1313284
https://github.com/line/armeria/security/advisories/GHSA-8fp4-rp6c-5gcv

Copyright 2022, cxsecurity.com

 

Back to Top