Arbitrary file upload in osTicket - CVE-2019-14748
Published: August 7, 2019 / Updated: June 17, 2021
Vulnerability identifier: #VU30830
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/U:Green
CVE-ID: CVE-2019-14748
CWE-ID: CWE-434
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: osTicket.com
Affected software:
osTicket
osTicket
Detailed vulnerability description
The vulnerability allows a remote authenticated user to read and manipulate data.
An issue was discovered in osTicket before 1.10.7 and 1.12.x before 1.12.1. The Ticket creation form allows users to upload files along with queries. It was found that the file-upload functionality has fewer (or no) mitigations implemented for file content checks; also, the output is not handled properly, causing persistent XSS that leads to cookie stealing or malicious actions. For example, a non-agent user can upload a .html file, and Content-Disposition will be set to inline instead of attachment.
How to mitigate CVE-2019-14748
Install update from vendor's website.
Sources
- http://packetstormsecurity.com/files/154003/osTicket-1.12-File-Upload-Cross-Site-Scripting.html
- https://github.com/osTicket/osTicket/commit/33ed106b1602f559a660a69f931a9d873685d1ba
- https://github.com/osTicket/osTicket/releases/tag/v1.10.7
- https://github.com/osTicket/osTicket/releases/tag/v1.12.1
- https://www.exploit-db.com/exploits/47224