Vulnerability Details : CVE-2023-6549
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
Vulnerability category: Denial of service
Products affected by CVE-2023-6549
- Citrix » Netscaler Application Delivery Controller »Versions from including (>=) 13.1 and before (<) 13.1-51.15cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*
- Citrix » Netscaler Application Delivery Controller »Versions from including (>=) 14.1 and before (<) 14.1-12.35cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*
- Citrix » Netscaler Application Delivery Controller » Fips EditionVersions from including (>=) 13.1 and before (<) 13.1-37.176cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*
- Citrix » Netscaler Application Delivery Controller » Ndcpp EditionVersions from including (>=) 12.1 and before (<) 12.1-55.302cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:*
- Citrix » Netscaler Application Delivery Controller » Fips EditionVersions from including (>=) 12.1 and before (<) 12.1-55.302cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*
- Citrix » Netscaler Application Delivery Controller »Versions from including (>=) 13.0 and before (<) 13.0-92.21cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*
- cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*
- cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*
- cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*
CVE-2023-6549 is in the CISA Known Exploited Vulnerabilities Catalog
CISA vulnerability name:
Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability
CISA required action:
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA description:
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.
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
Added on
2024-01-17
Action due date
2024-02-07
Exploit prediction scoring system (EPSS) score for CVE-2023-6549
2.03%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 89 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-6549
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST | 2024-01-24 |
|
8.2
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H |
3.9
|
4.2
|
Citrix Systems, Inc. | 2024-01-17 |
CWE ids for CVE-2023-6549
-
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.Assigned by:
- nvd@nist.gov (Primary)
- secure@citrix.com (Secondary)
References for CVE-2023-6549
-
https://support.citrix.com/article/CTX584986/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20236548-and-cve20236549
NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2023-6548 and CVE-2023-6549Vendor Advisory
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