CVE-2023-3519
Citrix — Citrix NetScaler ADC and NetScaler Gateway Code Injection Vulnerability
Citrix · CWE-94 — Code injection · in CISA KEV since 2023-07-19
EVRS 94 of 100 Immediate
Out-of-Band / Urgent Remediation
Rank 58 of 2,962 tracked
Why it scores 94
Evidence available: 6 of 7 signalsListed in the CISA KEV catalog, and associated with known ransomware campaigns.
- CISA KEVApplied
- RansomwareApplied
- Vendor exploitationDid not apply
- EPSSApplied
- Microsoft Exploitability IndexNot applicable
- Pre-patch disclosureNo data
- KEV recencyDid not apply
- CVSSApplied
The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data
Fix
Patch or fixed version identifiedCISA required action
- support.citrix.com/…/citrix-adc-and-citrix-gateway-security-bulletin-for-cve20233519-cve20233466-cve20233467
- nvd.nist.gov/…/CVE-2023-3519
Fixed in
netscaler application delivery controller: update to 12.1-55.297 or later | netscaler application delivery controller: update to 13.0-91.13 or later | netscaler application delivery controller: update to 13.1-37.159 or later | netscaler application delivery controller: update to 13.1-49.13 or later | netscaler gateway: update to 13.0-91.13 or later | netscaler gateway: update to 13.1-49.13 or later
Affected versions
- netscaler application delivery controller
>= 12.1 < 12.1-55.297>= 13.0 < 13.0-91.13>= 13.1 < 13.1-37.159>= 13.1 < 13.1-49.13 - netscaler gateway
>= 13.0 < 13.0-91.13>= 13.1 < 13.1-49.13
Remediation
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Fixed versions from NVD.
Evidence
Each value with its source| Measure | Value | Source |
|---|---|---|
| CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. | 9.8 | NVD |
| FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. | 0.997 (99.95th pctl) | FIRST EPSS |
| Actively exploitedWhether a source of record has confirmed attacks using it in the wild. | Confirmed | CISA KEV |
| Ransomware campaign useWhether CISA has seen ransomware operators use it. | Known | CISA KEV |
| CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. | 2023-08-09 · KEV since 2023 · listed over a year | CISA KEV |
| Public exploit moduleA module existing is not the same as active exploitation. | Public module exists | Metasploit |
| EUVD cross-referenceENISA's record: CVSS 9.8 (v3.1), assigned by Citrix. | Listed | ENISA EUVD |
Description
NVDUnauthenticated remote code execution
What CISA says to do
- support.citrix.com/…/citrix-adc-and-citrix-gateway-security-bulletin-for-cve20233519-cve20233466-cve20233467
- nvd.nist.gov/…/CVE-2023-3519
Public module
Metasploit lists a public normal-rank module for this CVE: Citrix ADC (NetScaler) Forms SSO Target RCE (freebsd/http/citrix_formssso_target_rce). A module existing is not the same as active exploitation; see metasploit.com.