Vulnerability Details : CVE-2019-19781

Public exploit exists!
Used for ransomware!
An issue was discovered in Citrix Application Delivery Controller (ADC) and Gateway 10.5, 11.1, 12.0, 12.1, and 13.0. They allow Directory Traversal.
Published 2019-12-27 14:15:12
Updated 2025-04-03 19:51:47
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Directory traversal

Products affected by CVE-2019-19781

CVE-2019-19781 is in the CISA Known Exploited Vulnerabilities Catalog

This issue is known to have been leveraged as part of a ransomware campaign.
CISA vulnerability name:
Citrix ADC, Gateway, and SD-WAN WANOP Appliance Code Execution Vulnerability
CISA required action:
Apply updates per vendor instructions.
CISA description:
Citrix ADC, Citrix Gateway, and multiple Citrix SD-WAN WANOP appliance models contain an unspecified vulnerability that could allow an unauthenticated attacker to perform code execution.
Notes:
https://nvd.nist.gov/vuln/detail/CVE-2019-19781
Added on 2021-11-03 Action due date 2022-05-03

Exploit prediction scoring system (EPSS) score for CVE-2019-19781

EPSS FAQ
94.44%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 100 %
Percentile, the proportion of vulnerabilities that are scored at or less

Metasploit modules for CVE-2019-19781

  • Citrix ADC (NetScaler) Directory Traversal RCE
    Disclosure Date: 2019-12-17
    First seen: 2020-04-26
    exploit/linux/http/citrix_dir_traversal_rce
    exploit/linux/http/citrix_dir_traversal_rce This module exploits a directory traversal in Citrix Application Delivery Controller (ADC), aka NetScaler, and Gateway 10.5, 11.1, 12.0, 12.1, and 13.0, to execute an arbitrary command payload.
  • Citrix ADC (NetScaler) Directory Traversal RCE
    Disclosure Date: 2019-12-17
    First seen: 2021-04-16
    exploit/freebsd/http/citrix_dir_traversal_rce
    This module exploits a directory traversal in Citrix Application Delivery Controller (ADC), aka NetScaler, and Gateway 10.5, 11.1, 12.0, 12.1, and 13.0, to execute an arbitrary command payload.
  • Citrix ADC (NetScaler) Directory Traversal Scanner
    Disclosure Date: 2019-12-17
    First seen: 2020-04-26
    auxiliary/scanner/http/citrix_dir_traversal
    This module exploits a directory traversal vulnerability (CVE-2019-19781) within Citrix ADC (NetScaler). It requests the smb.conf file located in the /vpns/cfg directory by issuing the request /vpn/../vpns/cfg/smb.conf. It then checks if the server is vulnerable by looking f

CVSS scores for CVE-2019-19781

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
7.5
 HIGH AV:N/AC:L/Au:N/C:P/I:P/A:P
10.0
6.4
 NIST
9.8
 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.9
5.9
 134c704f-9b21-4f2e-91b3-4a467353bcc0 2025-02-04
9.8
 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.9
5.9
 NIST

CWE ids for CVE-2019-19781

  • The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
    Assigned by:
    • 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)
    • nvd@nist.gov (Primary)

References for CVE-2019-19781

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