CVEvulnerability

CVE-2023-6549

7.5 HIGH Known exploited Published 2024-01-17 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability — Citrix NetScaler ADC and NetScaler Gateway

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

Added to KEV
2024-01-17
Remediation due
2024-02-07
Ransomware use
Unknown
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Notes
https://support.citrix.com/article/CTX584986/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20236548-and-cve20236549; https://nvd.nist.gov/vuln/detail/CVE-2023-6549
Status
Analyzed
Published
2024-01-17
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.2 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-119

Description

Improper Restriction of Operations within the Bounds of a Memory Buffer in NetScaler ADC and NetScaler Gateway allows Unauthenticated Denial of Service and Out-Of-Bounds Memory Read

Affected configurations

• citrix netscaler application delivery controller (>= 12.1 < 12.1-55.302) • citrix netscaler application delivery controller (>= 13.0 < 13.0-92.21) • citrix netscaler application delivery controller (>= 13.1 < 13.1-37.176) • citrix netscaler application delivery controller (>= 13.1 < 13.1-51.15) • citrix netscaler application delivery controller (>= 14.1 < 14.1-12.35) • citrix netscaler gateway (>= 13.0 < 13.0-92.21) • citrix netscaler gateway (>= 13.1 < 13.1-51.15) • citrix netscaler gateway (>= 14.1 < 14.1-12.35)

Related

Weakness · CWE (1)

  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer weakness

References