NULL pointer dereference in ZNC - CVE-2020-13775
Published: July 6, 2020
Vulnerability identifier: #VU29532
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2020-13775
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: ZNC
Affected software:
ZNC
ZNC
Detailed vulnerability description
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.
How to mitigate CVE-2020-13775
Install updates from vendor's website.
Sources
- 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/