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CVE-2021-43795

High

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.

SeverityHigh
CVSS7.5
Exploit probability—
ProductLinecorp Armeria
PublishedDec 2, 2021
First seenDec 2, 2021
Weakness typeCWE-22Path traversal

How to fix

Update
  • linecorp armeria1.13.4 or later
  • com.linecorp.armeria:armeria1.13.4 or later

Affected products

ProductAffected versionsFixed in
linecorp armeriav < 1.13.41.13.4
com.linecorp.armeria:armeriaMaven1.12.0 ≤ v < 1.13.41.13.4

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