Vulnerability identifier: #VU32936

Vulnerability risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-14311

CWE-ID: CWE-190

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
grub
Universal components / Libraries / Libraries used by multiple products

Vendor: GNU

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to integer overflow within the grub_ext2_read_link() function when processing symlinks. A local user can create a specially crafted symlink, trigger integer overflow and crash the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

grub: 2.00 - 2.05

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External links
http://bugzilla.redhat.com/show_bug.cgi?id=1852014

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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.