#VU81427 UNIX symbolic link following in Apache Mina SSHD - CVE-2023-35887

Vulnerability identifier: #VU81427

Vulnerability risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-35887

CWE-ID: CWE-61

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Apache Mina SSHD
Server applications / Remote management servers, RDP, SSH

Vendor: Apache Foundation

Description

The vulnerability allows a remote user to gain access to sensitive information.

The vulnerability exists due to insecure symlink following that lead to files outside the RootedFileSystem. A remote user can identify presence of files on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Apache Mina SSHD: 1.0.0 - 2.9.2

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External links
https://lists.apache.org/thread/b9qgtqvhnvgfpn0w1gz918p21p53tqk2

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.