Buffer overflow in Citrix Netscaler ADC and Citrix NetScaler Gateway - CVE-2023-4967
Published: October 11, 2023
Vulnerability identifier: #VU81927
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-4967
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error. A remote non-authenticated attacker can send specially crafted data
to the device, trigger memory corruption and perform a denial of service (DoS) attack.
Successful exploitation of this vulnerability requires that the appliance is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or as AAAvirtualserver.
Affected software
Citrix Netscaler ADC
Citrix NetScaler Gateway
Citrix NetScaler Gateway
How to mitigate CVE-2023-4967
Install updates from vendor's website.
For FIPS releases install the following versions:
- NetScaler ADC 13.1-FIPS version 13.1-37.164
- NetScaler ADC 12.1-FIPS version 12.1-55.300
- NetScaler ADC 12.1-NDcPP version 12.1-55.300
Citrix Netscaler ADC - addressed in versions 13.0-92.19, 13.1-49.15, 14.1-8.50
Citrix NetScaler Gateway - addressed in versions 13.0-92.19, 13.1-49.15, 14.1-8.50
Citrix NetScaler Gateway - addressed in versions 13.0-92.19, 13.1-49.15, 14.1-8.50