SB2020070603 - Denial of service in ZNC
Published: July 6, 2020
Security Bulletin ID
SB2020070603
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2020-13775)
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error. A remote authenticated user can pass specially crafted data to the application and perform a denial of service (DoS) attack.
Successful exploitation of the vulnerability requires that the echo-message is not enabled and there is no network.
Remediation
Install update from vendor's website.
References
- https://github.com/znc/znc/commit/2390ad111bde16a78c98ac44572090b33c3bd2d8
- https://github.com/znc/znc/commit/d229761821da38d984a9e4098ad96842490dc001
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DNVBE4T2DRJRQHFRMHYBTN4OSOL6DBHR/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HS3DWGXLVRROQQA57UIPMDM6XMVEMBRA/