NULL pointer dereference in ZNC - CVE-2020-13775

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Main Vulnerability Database Vulnerabilities #VU29532

NULL pointer dereference in ZNC - CVE-2020-13775

Published: July 6, 2020


Vulnerability identifier: #VU29532
CSH Severity: Low
CVSS v4: 6 [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]
CVE-ID: CVE-2020-13775
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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.


Affected software

ZNC
znc (Alpine package)
znc
Fedora

How to mitigate CVE-2020-13775

Install updates from vendor's website.

ZNC - update to 1.8.1
znc (Alpine package) - update to 1.8.1-r0
znc - addressed in versions 1.8.1-1.el7, 1.8.1-1.el8, 1.8.1-1.fc31, 1.8.1-1.fc32

External References

Related Security Bulletins