#VU32011 Permissions, Privileges, and Access Controls in ZNC - CVE-2019-12816

Vulnerability identifier: #VU32011

Vulnerability risk: High

CVSSv4.0: 6.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2019-12816

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ZNC
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: ZNC

Description

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

Modules.cpp in ZNC before 1.7.4-rc1 allows remote authenticated non-admin users to escalate privileges and execute arbitrary code by loading a module with a crafted name.

Mitigation
Install update from vendor's website.

Vulnerable software versions

ZNC: 1.7.0 - 1.7.4

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External links
https://lists.opensuse.org/opensuse-security-announce/2019-07/msg00037.html
https://lists.opensuse.org/opensuse-security-announce/2019-08/msg00018.html
https://github.com/znc/znc/commit/8de9e376ce531fe7f3c8b0aa4876d15b479b7311
https://github.com/znc/znc/compare/be1b6bc...d1997d6
https://lists.debian.org/debian-lts-announce/2019/06/msg00017.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4O24TQOB73X57GACLZVMRVUK4UKHLE5G/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NHR6OD52FQAG5ZPZ42NJM2T765C3V2XC/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TEESIGRNFLZUWXZPDGXAZ7JZTHYBDJ7G/
https://seclists.org/bugtraq/2019/Jun/23
https://security.gentoo.org/glsa/201908-15
https://usn.ubuntu.com/4044-1/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.