High severity · published Oct 10, 2023
CVE-2023-4966
Unauthenticated sensitive information disclosure
RansomwareIn wildKEV
7.5
CVSS
100%
EPSS
Yes
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)100.0% · higher than 100% of CVEs
Exploited in the wildYes
CISA KEVListed Oct 18, 2023
Federal remediation dueNov 8, 2023
Ransomware campaign useKnown
Affected products
Which versions
NA
NetScaler ADC · Citrix
14.1 before 8.50; 13.1 before 49.15; 13.0 before 92.19; 13.1-FIPS before 37.164; 12.1-FIPS before 55.300; 12.1-NDcPP before 55.300 · source: vendor, NVD
NA
NetScaler ADC and NetScaler Gateway · Citrix
All versions, or not specified · source: KEV
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-4966
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-4966
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
support.citrix.com
https://support.citrix.com/article/CTX579459
packetstormsecurity.com
http://packetstormsecurity.com/files/175323/Citrix-Bleed-Session-Token-Leakage-Proof-Of-Concept.html
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