#VU47658 Out-of-bounds read in F2fs.Fsck - CVE-2020-6106

Vulnerability identifier: #VU47658

Vulnerability risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-6106

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 "init_node_manager" functionality. A local administrator can use a specially crafted 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: 1.12 - 1.13

---

External links
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1048

---

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.