9.4

CVE-2023-4966

Warning
Media report

Sensitive information disclosure in NetScaler ADC and NetScaler Gateway when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA  virtual server.

Data is provided by the National Vulnerability Database (NVD)
Citrix ≫ Netscaler Application Delivery Controller SwEditionfips Version >= 12.1 < 12.1-55.300
Citrix ≫ Netscaler Application Delivery Controller SwEditionndcpp Version >= 12.1 < 12.1-55.300
Citrix ≫ Netscaler Application Delivery Controller SwEdition- Version >= 13.0 < 13.0-92.19
Citrix ≫ Netscaler Application Delivery Controller SwEditionfips Version >= 13.1 < 13.1-37.164
Citrix ≫ Netscaler Application Delivery Controller SwEdition- Version >= 13.1 < 13.1-49.15
Citrix ≫ Netscaler Application Delivery Controller SwEdition- Version >= 14.1 < 14.1-8.50
Citrix ≫ NetScaler Gateway Version >= 13.0 < 13.0-92.19
Citrix ≫ NetScaler Gateway Version >= 13.1 < 13.1-49.15
Citrix ≫ NetScaler Gateway Version >= 14.1 < 14.1-8.50

18.10.2023: CISA Known Exploited Vulnerabilities (KEV) Catalog

Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability

Vulnerability

Citrix NetScaler ADC and NetScaler Gateway contain a buffer overflow vulnerability that allows for sensitive information disclosure when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server.

Description

Apply mitigations and kill all active and persistent sessions per vendor instructions [https://www.netscaler.com/blog/news/cve-2023-4966-critical-security-update-now-available-for-netscaler-adc-and-netscaler-gateway/] OR discontinue use of the product if mitigations are unavailable.

Required actions
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 94.34% 1
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string
nvd@nist.gov 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
secure@citrix.com 9.4 3.9 5.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.