#VU47656 Out-of-bounds read in F2fs.Fsck


Published: 2020-10-15

Vulnerability identifier: #VU47656

Vulnerability risk: Low

CVSSv3.1: 4.1 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2020-6104

CWE-ID: CWE-125

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
F2fs.Fsck
Other software / Other software solutions

Vendor: F2fs-Tools

Description

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

The vulnerability exists due to a boundary condition in the "get_dnode_of_data" functionality. A local administrator can use a specially crafted f2fs filesystem, trigger out-of-bounds read error and read contents of memory on the system.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

F2fs.Fsck: 1.13


External links
http://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1046


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.


Latest bulletins with this vulnerability