Denial of service in ZNC



| Updated: 2019-04-18
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-9917
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
 ZNC
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor ZNC

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Input validation error

EUVDB-ID: #VU18315

Risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-9917

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

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

CPE2.3 External links

https://github.com/znc/znc/commit/64613bc8b6b4adf1e32231f9844d99cd512b8973
https://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.

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.



###SIDEBAR###