Information disclosure in Linux kernel rxrpc

1) Information disclosure

EUVDB-ID: #VU91325

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-2021-47538

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 rxrpc_create_peer(), rxrpc_lookup_peer(), __rxrpc_put_peer() and rxrpc_put_peer_locked() functions in net/rxrpc/peer_object.c. A local user can gain access to sensitive information.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

External links

http://git.kernel.org/stable/c/913c24af2d13a3fd304462916ee98e298d56bdce
http://git.kernel.org/stable/c/3e70e3a72d80b16094faccbe438cd53761c3503a
http://git.kernel.org/stable/c/60f0b9c42cb80833a03ca57c1c8b078d716e71d1
http://git.kernel.org/stable/c/9469273e616ca8f1b6e3773c5019f21b4c8d828c
http://git.kernel.org/stable/c/beacff50edbd6c9659a6f15fc7f6126909fade29

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.