#VU85436 Buffer overflow in Citrix Netscaler ADC and Citrix NetScaler Gateway - CVE-2023-6549
Published: January 16, 2024 / Updated: January 17, 2024
Vulnerability identifier: #VU85436
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber
CVE-ID: CVE-2023-6549
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerable software:
Citrix Netscaler ADC
Citrix NetScaler Gateway
Citrix Netscaler ADC
Citrix NetScaler Gateway
Software vendor:
Citrix
Citrix
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error. A remote attacker can send specially crated packets to the system, trigger memory corruption and perform a denial of service (DoS) attack.
Successful exploitation of this vulnerability requires that the device is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAAvirtualserver.
Note, the vulnerability is being actively exploited in the wild.
Remediation
Install updates from vendor's website.