CVE-2023-4966

Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

Yes

*KEV

Decision

Act

*SSVC

Descriptions

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.

Divulgación de información confidencial en NetScaler ADC y NetScaler Gateway cuando se configura como Gateway (servidor virtual VPN, ICA Proxy, CVPN, RDP Proxy) o servidor "virtual" AAA.

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.

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.

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.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

Low

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Act

Exploitation

Active

Automatable

Yes

Tech. Impact

Total

* Organization's Worst-case Scenario

Timeline

2023-09-14 CVE Reserved
2023-10-10 CVE Published
2023-10-18 Exploited in Wild
2023-10-25 First Exploit
2023-11-08 KEV Due Date
2025-02-13 CVE Updated
2025-07-16 EPSS Updated

CWE

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

CAPEC

References (19)

URL	Tag	Source
http://packetstormsecurity.com/files/175323/Citrix-Bleed-Session-Token-Leakage-Proof-Of-Concept.html	Third Party Advisory
https://www.assetnote.io/resources/research/citrix-bleed-leaking-session-tokens-with-cve-2023-4966

URL	Date	SRC
https://packetstorm.news/files/id/175323	2023-10-25
https://packetstorm.news/files/id/181041	2024-09-01
https://github.com/Chocapikk/CVE-2023-4966	2023-10-26
https://github.com/RevoltSecurities/CVE-2023-4966	2023-10-29
https://github.com/byte4RR4Y/CVE-2023-4966	2023-11-27
https://github.com/0xKayala/CVE-2023-4966	2023-10-28
https://github.com/mlynchcogent/CVE-2023-4966-POC	2023-10-25
https://github.com/IceBreakerCode/CVE-2023-4966	2023-10-25
https://github.com/s-bt/CVE-2023-4966	2023-11-20
https://github.com/senpaisamp/Netscaler-CVE-2023-4966-POC	2024-04-23
https://github.com/LucasOneZ/CVE-2023-4966	2024-09-14
https://github.com/dinosn/citrix_cve-2023-4966	2024-07-25
https://github.com/certat/citrix-logchecker	2024-06-27
https://github.com/jmussmann/cve-2023-4966-iocs	2023-12-08
https://github.com/morganwdavis/overread	2024-04-22
https://github.com/akshthejo/CVE-2023-4966-exploit	2024-12-18

URL	Date	SRC

URL	Date	SRC
https://support.citrix.com/article/CTX579459	2024-06-17

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Citrix Search vendor "Citrix"		Netscaler Application Delivery Controller Search vendor "Citrix" for product "Netscaler Application Delivery Controller"				>= 12.1 < 12.1-55.300 Search vendor "Citrix" for product "Netscaler Application Delivery Controller" and version " >= 12.1 < 12.1-55.300"		fips		Affected
Citrix Search vendor "Citrix"		Netscaler Application Delivery Controller Search vendor "Citrix" for product "Netscaler Application Delivery Controller"				>= 12.1 < 12.1-55.300 Search vendor "Citrix" for product "Netscaler Application Delivery Controller" and version " >= 12.1 < 12.1-55.300"		ndcpp		Affected
Citrix Search vendor "Citrix"		Netscaler Application Delivery Controller Search vendor "Citrix" for product "Netscaler Application Delivery Controller"				>= 13.0 < 13.0-92.19 Search vendor "Citrix" for product "Netscaler Application Delivery Controller" and version " >= 13.0 < 13.0-92.19"		-		Affected
Citrix Search vendor "Citrix"		Netscaler Application Delivery Controller Search vendor "Citrix" for product "Netscaler Application Delivery Controller"				>= 13.1 < 13.1-37.164 Search vendor "Citrix" for product "Netscaler Application Delivery Controller" and version " >= 13.1 < 13.1-37.164"		fips		Affected
Citrix Search vendor "Citrix"		Netscaler Application Delivery Controller Search vendor "Citrix" for product "Netscaler Application Delivery Controller"				>= 13.1 < 13.1-49.15 Search vendor "Citrix" for product "Netscaler Application Delivery Controller" and version " >= 13.1 < 13.1-49.15"		-		Affected
Citrix Search vendor "Citrix"		Netscaler Application Delivery Controller Search vendor "Citrix" for product "Netscaler Application Delivery Controller"				>= 14.1 < 14.1-8.50 Search vendor "Citrix" for product "Netscaler Application Delivery Controller" and version " >= 14.1 < 14.1-8.50"		-		Affected
Citrix Search vendor "Citrix"		Netscaler Gateway Search vendor "Citrix" for product "Netscaler Gateway"				>= 13.0 < 13.0-92.19 Search vendor "Citrix" for product "Netscaler Gateway" and version " >= 13.0 < 13.0-92.19"		-		Affected
Citrix Search vendor "Citrix"		Netscaler Gateway Search vendor "Citrix" for product "Netscaler Gateway"				>= 13.1 < 13.1-49.15 Search vendor "Citrix" for product "Netscaler Gateway" and version " >= 13.1 < 13.1-49.15"		-		Affected
Citrix Search vendor "Citrix"		Netscaler Gateway Search vendor "Citrix" for product "Netscaler Gateway"				>= 14.1 < 14.1-8.50 Search vendor "Citrix" for product "Netscaler Gateway" and version " >= 14.1 < 14.1-8.50"		-		Affected