CVE-2023-4967 Denial of service
Attackers can cause denial of service in NetScaler ADC and Gateway when configured as a Gateway or AAA Virtual Server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-4967?
CVE-2023-4967 is a high-severity denial of service vulnerability in Cloud Software Group NetScaler ADC, published on 27 Oct 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Denial of Service in NetScaler ADC and NetScaler Gateway when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA Virtual Server
Weakness: CWE-119
Which versions are affected by CVE-2023-4967?
It affects 2 products.
Products include Citrix NetScaler ADC, Citrix Netscaler Gateway.
How do I fix CVE-2023-4967?
No fix has been published for CVE-2023-4967 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-4967 being exploited?
There is no known exploitation of CVE-2023-4967 in the wild and no public exploit code.
Other vulnerabilities in Cloud Software Group NetScaler ADC
- CVE-2023-3519 Citrix NetScaler ADC and NetScaler Gateway Code Injection
- CVE-2026-88771 Citrix NetScaler Improper Input Validation
- CVE-2026-88772 Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer
- CVE-2023-4966 Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow
- CVE-2026-19490 Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel
Sources
Also known as GHSA-wj66-97v8-j738.