Information disclosure in Linux kernel

1) Input validation error

EUVDB-ID: #VU46814

Risk: Low

CVSSv3.1: 3.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2020-10773

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

A stack information leak flaw was found in s390/s390x in the Linux kernel’s memory manager functionality, where it incorrectly writes to the /proc/sys/vm/cmm_timeout file. A local privileges user can gain access to sensitive data in the memory.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.4.0 rc6

External links

http://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10773
http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b8e51a6a9db94bc1fb18ae831b3dab106b5a4b5f

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.