#VU48570 UNIX symbolic link following


Published: 2020-11-20

Vulnerability identifier: #VU48570

Vulnerability risk: Low

CVSSv3: 6.4 [CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-28407

CWE-ID: CWE-61

Exploitation vector: Local

Exploit availability: No

Vulnerable software: swtpm
Universal components / Libraries / Libraries used by multiple products

Vendor: Stefan Berger

Description

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

The vulnerability exists due to a symlink following issue. A local user can create a specially crafted symbolic link to a critical file on the system and overwrite it with privileges of the application.

Successful exploitation of this vulnerability may result in privilege escalation.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

swtpm: 0.1.0, 0.1.1, 0.2.0, 0.2.1, 0.3.0, 0.3.1, 0.3.2, 0.3.3, 0.3.4, 0.4.0, 0.4.1, 0.4.2, 0.5.0

CPE

External links
https://github.com/stefanberger/swtpm/compare/v0.5.0...v0.5.1
https://security.archlinux.org/advisory/ASA-202011-21


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