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Vulnerability Details :

CVE-2023-4966

Summary
Assigner-Citrix
Assigner Org ID-e437aed5-38e0-4fa3-a98b-cb73e7acaec6
Published At-10 Oct, 2023 | 13:12
Updated At-30 Jul, 2025 | 01:37
Rejected At-
Credits

Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow 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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Known Exploited Vulnerabilities (KEV)
cisa.gov
Vendor:
Citrix (Cloud Software Group, Inc.)Citrix
Product:NetScaler ADC and NetScaler Gateway
Added At:18 Oct, 2023
Due At:08 Nov, 2023

Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow 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.

Used in Ransomware

:

Known

CWE

:
CWE-119

Required Action:

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.

Additional Notes:

https://www.netscaler.com/blog/news/cve-2023-4966-critical-security-update-now-available-for-netscaler-adc-and-netscaler-gateway/, https://support.citrix.com/article/CTX579459/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20234966-and-cve20234967 ; https://nvd.nist.gov/vuln/detail/CVE-2023-4966
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:Citrix
Assigner Org ID:e437aed5-38e0-4fa3-a98b-cb73e7acaec6
Published At:10 Oct, 2023 | 13:12
Updated At:30 Jul, 2025 | 01:37
Rejected At:
▼CVE Numbering Authority (CNA)
Unauthenticated sensitive information disclosure

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.

Affected Products
Vendor
Citrix (Cloud Software Group, Inc.)Citrix
Product
NetScaler ADC
Default Status
unaffected
Versions
Affected
  • From 14.1 before 8.50 (patch)
  • From 13.1 before 49.15 (patch)
  • From 13.0 before 92.19 (patch)
  • From 13.1-FIPS before 37.164 (patch)
  • From 12.1-FIPS before 55.300 (patch)
  • From 12.1-NDcPP before 55.300 (patch)
Vendor
Citrix (Cloud Software Group, Inc.)Citrix
Product
NetScaler Gateway
Default Status
unaffected
Versions
Affected
  • From 14.1 before 8.50 (patch)
  • From 13.1 before 49.15 (patch)
  • From 13.0 before 92.19 (patch)
Problem Types
TypeCWE IDDescription
CWECWE-119CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
Type: CWE
CWE ID: CWE-119
Description: CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
Metrics
VersionBase scoreBase severityVector
3.19.4CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Version: 3.1
Base score: 9.4
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://support.citrix.com/article/CTX579459
N/A
http://packetstormsecurity.com/files/175323/Citrix-Bleed-Session-Token-Leakage-Proof-Of-Concept.html
N/A
Hyperlink: https://support.citrix.com/article/CTX579459
Resource: N/A
Hyperlink: http://packetstormsecurity.com/files/175323/Citrix-Bleed-Session-Token-Leakage-Proof-Of-Concept.html
Resource: N/A
▼Authorized Data Publishers (ADP)
1. CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://support.citrix.com/article/CTX579459
x_transferred
http://packetstormsecurity.com/files/175323/Citrix-Bleed-Session-Token-Leakage-Proof-Of-Concept.html
x_transferred
Hyperlink: https://support.citrix.com/article/CTX579459
Resource:
x_transferred
Hyperlink: http://packetstormsecurity.com/files/175323/Citrix-Bleed-Session-Token-Leakage-Proof-Of-Concept.html
Resource:
x_transferred
2. CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
kev
dateAdded:
2023-10-18
reference:
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-4966
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
CVE-2023-4966 added to CISA KEV2023-10-18 00:00:00
Event: CVE-2023-4966 added to CISA KEV
Date: 2023-10-18 00:00:00
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:secure@citrix.com
Published At:10 Oct, 2023 | 14:15
Updated At:13 Mar, 2025 | 19:53

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
2023-10-182023-11-08Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow VulnerabilityApply 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.
Date Added: 2023-10-18
Due Date: 2023-11-08
Vulnerability Name: Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability
Required Action: 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.
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.19.4CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Primary3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Type: Secondary
Version: 3.1
Base score: 9.4
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Type: Primary
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CPE Matches
Citrix (Cloud Software Group, Inc.)
citrix
>>netscaler_application_delivery_controller>>Versions from 12.1(inclusive) to 12.1-55.300(exclusive)
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*
Citrix (Cloud Software Group, Inc.)
citrix
>>netscaler_application_delivery_controller>>Versions from 12.1(inclusive) to 12.1-55.300(exclusive)
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:*
Citrix (Cloud Software Group, Inc.)
citrix
>>netscaler_application_delivery_controller>>Versions from 13.0(inclusive) to 13.0-92.19(exclusive)
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*
Citrix (Cloud Software Group, Inc.)
citrix
>>netscaler_application_delivery_controller>>Versions from 13.1(inclusive) to 13.1-37.164(exclusive)
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*
Citrix (Cloud Software Group, Inc.)
citrix
>>netscaler_application_delivery_controller>>Versions from 13.1(inclusive) to 13.1-49.15(exclusive)
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*
Citrix (Cloud Software Group, Inc.)
citrix
>>netscaler_application_delivery_controller>>Versions from 14.1(inclusive) to 14.1-8.50(exclusive)
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*
Citrix (Cloud Software Group, Inc.)
citrix
>>netscaler_gateway>>Versions from 13.0(inclusive) to 13.0-92.19(exclusive)
cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*
Citrix (Cloud Software Group, Inc.)
citrix
>>netscaler_gateway>>Versions from 13.1(inclusive) to 13.1-49.15(exclusive)
cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*
Citrix (Cloud Software Group, Inc.)
citrix
>>netscaler_gateway>>Versions from 14.1(inclusive) to 14.1-8.50(exclusive)
cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-119Secondarysecure@citrix.com
NVD-CWE-noinfoPrimarynvd@nist.gov
CWE ID: CWE-119
Type: Secondary
Source: secure@citrix.com
CWE ID: NVD-CWE-noinfo
Type: Primary
Source: nvd@nist.gov
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
http://packetstormsecurity.com/files/175323/Citrix-Bleed-Session-Token-Leakage-Proof-Of-Concept.htmlsecure@citrix.com
Third Party Advisory
VDB Entry
https://support.citrix.com/article/CTX579459secure@citrix.com
Vendor Advisory
http://packetstormsecurity.com/files/175323/Citrix-Bleed-Session-Token-Leakage-Proof-Of-Concept.htmlaf854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
VDB Entry
https://support.citrix.com/article/CTX579459af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
Hyperlink: http://packetstormsecurity.com/files/175323/Citrix-Bleed-Session-Token-Leakage-Proof-Of-Concept.html
Source: secure@citrix.com
Resource:
Third Party Advisory
VDB Entry
Hyperlink: https://support.citrix.com/article/CTX579459
Source: secure@citrix.com
Resource:
Vendor Advisory
Hyperlink: http://packetstormsecurity.com/files/175323/Citrix-Bleed-Session-Token-Leakage-Proof-Of-Concept.html
Source: af854a3a-2127-422b-91ae-364da2661108
Resource:
Third Party Advisory
VDB Entry
Hyperlink: https://support.citrix.com/article/CTX579459
Source: af854a3a-2127-422b-91ae-364da2661108
Resource:
Vendor Advisory

Change History

0
Information is not available yet

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