Buffer overflow in Linux kernel

1) Buffer overflow

EUVDB-ID: #VU19564

Risk: Medium

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-20854

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a local attacker to access sensitive information on a targeted system.

The vulnerability exists due to improper memory operations performed by the "phy-ocelot-serdes.c" file. A local authenticated attacker can make a malicious request, cause an off-by-one out-of-bounds read condition and access sensitive information on the targeted system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 4.0 - 4.1.52

External links

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6acb47d1a318e5b3b7115354ebc4ea060c59d3a1
http://github.com/torvalds/linux/commit/6acb47d1a318e5b3b7115354ebc4ea060c59d3a1

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.