#VU33417 Permissions, Privileges, and Access Controls - CVE-2019-10143

Vulnerability identifier: #VU33417

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-2019-10143

CWE-ID: CWE-264

Exploitation vector: Local

Exploit availability: No

Description

The vulnerability allows a local authenticated user to execute arbitrary code.

** DISPUTED ** It was discovered freeradius up to and including version 3.0.19 does not correctly configure logrotate, allowing a local attacker who already has control of the radiusd user to escalate his privileges to root, by tricking logrotate into writing a radiusd-writable file to a directory normally inaccessible by the radiusd user. NOTE: the upstream software maintainer has stated "there is simply no way for anyone to gain privileges through this alleged issue."

Mitigation
Install update from vendor's website.

External links
https://packetstormsecurity.com/files/155361/FreeRadius-3.0.19-Logrotate-Privilege-Escalation.html
https://seclists.org/fulldisclosure/2019/Nov/14
https://access.redhat.com/errata/RHSA-2019:3353
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10143
https://freeradius.org/security/
https://github.com/FreeRADIUS/freeradius-server/pull/2666
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A6VKBZAZKJP5QKXDXRKCM2ZPZND3TFAX/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TKODLHHUOVAYENTBP4D3N25ST3Q6LJBP/

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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.