Privilege escalation in exim packaging for OpenSUSE



Published: 2020-04-10
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-8015
CWE-ID CWE-61
Exploitation vector Local
Public exploit N/A
Vulnerable software
Subscribe 		Opensuse
Operating systems & Components / Operating system

exim (OpenSUSE package)
Operating systems & Components / Operating system package or component

Vendor SUSE

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) UNIX symbolic link following

EUVDB-ID: #VU26755

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8015

CWE-ID: CWE-61 - UNIX Symbolic Link (Symlink) Following

Exploit availability: No

Description

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

The vulnerability exists due to a symlink following issue within the packaging of exim in openSUSE. A local user can create a specially crafted symbolic link to a critical file on the system and escalate privileges from mail to root.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Opensuse: 15.1

exim (OpenSUSE package): before 4.88-lp151.4.12.1

External links

http://bugzilla.suse.com/show_bug.cgi?id=1154183
http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00010.html


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.



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