CVE-2023-6548

Citrix NetScaler ADC and NetScaler Gateway: Code Injection

As of , CVE-2023-6548 in Citrix NetScaler ADC and NetScaler Gateway is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch soon.

Exploited
Yes: CISA listed it on 17 January 2024
US federal deadline
24 January 20247 days after CISA listed it. US federal civilian agencies must fix it by then.
Used in ransomware campaigns
Not known to CISA
EPSS score
0.03Higher than 87% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
EPSS when listed
No score that dayThe EPSS file of the day CISA listed it has no score for it.
Public exploit
None foundNeither Metasploit nor Exploit-DB lists one.
Fix
Vendor advice: support.citrix.comLinks below, from CISA's entry.

What CISA says to do

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

CISA's required action

What the flaw is

Citrix NetScaler ADC and NetScaler Gateway contain a code injection vulnerability that allows for authenticated remote code execution on the management interface with access to NSIP, CLIP, or SNIP.

CISA's description

Improper Control of Generation of Code ('Code Injection') in NetScaler ADC and NetScaler Gateway allows an attacker with access to NSIP, CLIP or SNIP with management interface to perform Authenticated (low privileged) remote code execution on Management Interface.

The CVE record's description, from Citrix

CVE published
17 January 2024
Assigned by
Citrix
CVSS
5.5 Medium (CVSS 3.1, from the CNA)
CWE-94
Improper Control of Generation of Code ('Code Injection')
CISA SSVC, exploitation
active
CISA SSVC, automatable
no
CISA SSVC, technical impact
total

Timeline

  1. The CVE record was published.
  2. CISA added it to its list of exploited vulnerabilities.
  3. The US federal deadline to fix it.

NetScaler ADC and NetScaler Gateway: other exploited entries

VulnerabilityProductOur groupListedDeadlineEPSS
CVE-2023-4966Buffer OverflowCitrix NetScaler ADC and NetScaler GatewayPatch this weekRansomware use; Metasploit module; EPSS 0.990.99
CVE-2023-3519Code InjectionCitrix NetScaler ADC and NetScaler GatewayPatch this weekRansomware use; Metasploit module; EPSS 0.990.99
CVE-2023-6549Buffer OverflowCitrix NetScaler ADC and NetScaler GatewayPatch this weekEPSS 0.580.58
CVE-2026-8452Improper Restriction of Operations within the Bounds of a Memory BufferCitrix NetScaler ADC and NetScaler GatewayPatch soon0.01

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