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 2023-01-20 16:21:05
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Directory traversal

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.
Added on 2021-11-03 Action due date 2022-05-03

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

97.54%
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
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: nvd@nist.gov (Primary)

References for CVE-2019-19781

Products affected by CVE-2019-19781

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