Privilege escalation in Dell EMC PowerScale OneFS and Dell EMC Isilon OneFS

1) Race condition

EUVDB-ID: #VU34100

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-7460

CWE-ID: CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to the sendmsg system call in the compat32 subsystem on 64-bit platforms has a time-of-check to time-of-use issue. A local user can tun a specially crafted program from userspace and modify control message headers after they are validation.

Successful exploitation of the vulnerability may allow an attacker to escalate privileges on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

EMC Isilon OneFS: All versions

PowerScale OneFS: 9.0.0 - 9.1.0

External links

http://www.dell.com/support/kbdoc/en-us/000180947/dsa-2020-226-dell-emc-powerscale-onefs-and-dell-emc-isilon-onefs-security-update-for-freebsd-vulnerability

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.