Information disclosure in Brocade Fabric OS

1) Path traversal

EUVDB-ID: #VU65809

Risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-27798

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a local user to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences. A local user with “user” or “factory” privileges can list the entirety of the filesystem utilizing the “more” binary and tab-completion.

Mitigation

Update to the latest supported version of Brocade Fabric OS.

Vulnerable software versions

Brocade Fabric OS: 7.3.1d - 7.4.1b

External links

http://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2022-2012

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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