Multiple vulnerabilities in osTicket.com osTicket

1) Arbitrary file upload

EUVDB-ID: #VU30830

Risk: Medium

CVSSv3.1: 4.9 [CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-14748

CWE-ID: CWE-434 - Unrestricted Upload of File with Dangerous Type

Exploit availability: Yes

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

osTicket: 1.12

External links

http://packetstormsecurity.com/files/154003/osTicket-1.12-File-Upload-Cross-Site-Scripting.html
http://github.com/osTicket/osTicket/commit/33ed106b1602f559a660a69f931a9d873685d1ba
http://github.com/osTicket/osTicket/releases/tag/v1.10.7
http://github.com/osTicket/osTicket/releases/tag/v1.12.1
http://www.exploit-db.com/exploits/47224

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

2) Improper Neutralization of Special Elements in Output Used by a Downstream Component

EUVDB-ID: #VU30831

Risk: High

CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-14749

CWE-ID: CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Exploit availability: Yes

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

An issue was discovered in osTicket before 1.10.7 and 1.12.x before 1.12.1. CSV (aka Formula) injection exists in the export spreadsheets functionality. These spreadsheets are generated dynamically from unvalidated or unfiltered user input in the Name and Internal Notes fields in the Users tab, and the Issue Summary field in the tickets tab. This allows other agents to download data in a .csv file format or .xls file format. This is used as input for spreadsheet applications such as Excel and OpenOffice Calc, resulting in a situation where cells in the spreadsheets can contain input from an untrusted source. As a result, the end user who is accessing the exported spreadsheet can be affected.

Mitigation

Install update from vendor's website.

Vulnerable software versions

osTicket: 1.12

External links

http://packetstormsecurity.com/files/154004/osTicket-1.12-Formula-Injection.html
http://github.com/osTicket/osTicket/commit/99818486c5b1d8aa445cee232825418d6834f249
http://github.com/osTicket/osTicket/releases/tag/v1.10.7
http://github.com/osTicket/osTicket/releases/tag/v1.12.1
http://www.exploit-db.com/exploits/47225

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

3) Cross-site scripting

EUVDB-ID: #VU30832

Risk: Low

CVSSv3.1: 5.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-14750

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: Yes

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker can permanently inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Update to version 1.12.1.

Vulnerable software versions

osTicket: 1.12

External links

http://packetstormsecurity.com/files/154005/osTicket-1.12-Cross-Site-Scripting.html
http://github.com/osTicket/osTicket/commit/c3ba5b78261e07a883ad8fac28c214486c854e12
http://github.com/osTicket/osTicket/releases/tag/v1.10.7
http://github.com/osTicket/osTicket/releases/tag/v1.12.1
http://www.exploit-db.com/exploits/47226

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.