#VU52687 Incorrect Conversion between Numeric Types in Linux kernel - CVE-2020-28588

Vulnerability identifier: #VU52687

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-28588

CWE-ID: CWE-681

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local attacker to gain unauthorized access to sensitive information on the system.

The vulnerability exists due to incorrect conversion between numeric types in the /proc/pid/syscall functionality. A local attacker can read /proc/pid/syscall to trigger this vulnerability, leading to the kernel leaking memory contents.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 5.1 rc4 - 5.10 rc4, 5.2 - 5.2.21, 5.3 - 5.3.18, 5.4 - 5.4.66, 5.5 - 5.5.19, 5.6 - 5.6.14, 5.7 - 5.7.10, 5.8 rc1 - 5.8.17, 5.9 rc1 - 5.9.16

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External links
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1211

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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.