Information disclosure in Linux kernel ceph

1) Information disclosure

EUVDB-ID: #VU91406

Risk: Low

CVSSv3.1: 2.9 [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-2021-47000

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

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

The vulnerability exists due to information disclosure within the __fh_to_dentry() function in fs/ceph/export.c. A local user can gain access to sensitive information.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

External links

http://git.kernel.org/stable/c/2ad8af2b70e986284050213230428b823b950a38
http://git.kernel.org/stable/c/bf45c9fe99aa8003d2703f1bd353f956dea47e40
http://git.kernel.org/stable/c/22fa4c8288f1ec40f6d62d7a32c57ac176f9f0bc
http://git.kernel.org/stable/c/0a219432127d396120fc88cabd82785e0ff72a2f
http://git.kernel.org/stable/c/1775c7ddacfcea29051c67409087578f8f4d751b

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.