NULL pointer dereference in InspIRCd - CVE-2019-20917
Published: September 11, 2020 / Updated: September 20, 2020
Vulnerability identifier: #VU46821
CSH Severity: Medium
CVSSv4.0: 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-2019-20917
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
InspIRCd
InspIRCd
Software vendor:
InspIRCd
InspIRCd
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 in mysql module, when built against mariadb-connector-c 3.0.5 or newer. A remote user can send specially crafted request to the InspIRCd daemon, trigger a NULL pointer dereference error and crash the server.
Successful exploitation of the vulnerability requires that sqlauth or sqloper modules are used.
Remediation
Install update from vendor's website.