Permissions, Privileges, and Access Controls in ZNC ZNC

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU32011

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-12816

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

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

External links

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

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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