Slackware Linux update for sudo

Published: 2021-01-20

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-23239 CVE-2021-23240
CWE-ID	CWE-59
Exploitation vector	Local
Public exploit	N/A
Vulnerable software Subscribe	Slackware Linux Operating systems & Components / Operating system
Vendor	Slackware

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Link following

EUVDB-ID: #VU49883

Risk: Low

CVSSv3.1: 2.2 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-23239

CWE-ID: CWE-59 - Improper Link Resolution Before File Access ('Link Following')

Exploit availability: No

Description

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

The sudoedit personality of Sudo before 1.9.5 may allow a local unprivileged user to perform arbitrary directory-existence tests by winning a sudo_edit.c race condition in replacing a user-controlled directory by a symlink to an arbitrary path.

Mitigation

Update the affected package sudo.

Vulnerable software versions

Slackware Linux: 14.0 - 14.2

External links

http://www.slackware.com/security/viewer.php?l=slackware-security&y=2021&m=slackware-security.432748

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.

2) Link following

EUVDB-ID: #VU49884