Home/CVE/Citrix SD-WAN and NetScaler Command Injection Vulnerability
CVE

CVE-2019-12991

Citrix SD-WAN and NetScaler Command Injection Vulnerability

Citrix SD-WAN 10.2.x before 10.2.3 and NetScaler SD-WAN 10.0.x before 10.0.8 have Improper Input Validation (issue 5 of 6).

HIGH · CVSS 8.8 ⚠ CISA KEV EPSS 0.80807
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  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 1% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬢

Required Remediation

Apply updates per vendor instructions.

⬡

Weakness Classification

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
▤

Affected Products & Versions

2
citrix netscaler sd-wan>= 10.0.0 and < 10.0.8
citrix sd-wan>= 10.2.0 and < 10.2.3
⚠

Public Exploits & PoCs

3
webappsCitrix SD-WAN Appliance 10.2.2 - Authentication Bypass / Remote Command Executionverified
pocpacketstormsecurity.com · Citrix-SD-WAN-Appliance-10.2.2-Authentication-Bypass-Remo...packetstormsecurity.com
pocwww.tenable.com · tra-2019-32www.tenable.com
▣

Scoring & Timeline

8.8
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD16 Jul 2019 · 06:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

1
cisaKEV-CVE-2019-12991
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.securityfocus.com/bid/109133Broken LinkThird Party AdvisoryVDB Entry
https://support.citrix.com/article/CTX251987Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-12991US Government Resource
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