#VU68336 UNIX symbolic link following in icinga - CVE-2019-3698

Vulnerability identifier: #VU68336

Vulnerability risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-3698

CWE-ID: CWE-61

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
icinga
Operating systems & Components / Operating system package or component

Vendor: SUSE

Description

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

The vulnerability exists due to a symlink following issue in the cronjob shipped with nagios. 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

icinga: before 1.13.3-12.6.1

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External links
https://bugzilla.suse.com/show_bug.cgi?id=1156309
https://lists.opensuse.org/opensuse-security-announce/2020-04/msg00014.html
https://lists.opensuse.org/opensuse-security-announce/2020-04/msg00022.html

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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.