CVE-2023-35887: Apache MINA SSHD: Information disclosure bugs with RootedFilesystem

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-07-10 · updated 2026-06-17
Weakness: CWE-22

Description

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Software Foundation Apache MINA. In SFTP servers implemented using Apache MINA SSHD that use a RootedFileSystem, logged users may be able to discover "exists/does not exist" information about items outside the rooted tree via paths including parent navigation ("..") beyond the root, or involving symlinks. This issue affects Apache MINA: from 1.0 before 2.10. Users are recommended to upgrade to 2.10

Affected products

Apache Sshd: from 1.0.0 before 2.9.3 — fixed in 2.9.3

How to fix

Upgrade to a fixed version: Apache Sshd 2.9.3. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2023-35887 or the next vulnerability affects your stack