Vulnerability identifier: #VU18315

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-9917

CWE-ID: CWE-20

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 attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can send a specially crafted message in incorrect encoding and cause the application to crash.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

ZNC: 1.7.0 - 1.7.3

---

External links
http://github.com/znc/znc/commit/64613bc8b6b4adf1e32231f9844d99cd512b8973
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7WTRBTPL7WWKQ7DZ2ALDTCGYUWSE6SL3/

---

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.