A vulnerability classified as critical was found in osTicket 1.10.1 (Ticket Tracking Software). Affected by this vulnerability is an unknown function of the file tickets.php of the component HTML File Handler. The manipulation with an unknown input leads to a unrestricted upload vulnerability. The CWE definition for the vulnerability is CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

osTicket 1.10.1 provides a functionality to upload 'html' files with associated formats. However, it does not properly validate the uploaded file's contents and thus accepts any type of file, such as with a tickets.php request that is modified with a .html extension changed to a .exe extension. An attacker can leverage this vulnerability to upload arbitrary files on the web application having malicious content.

The bug was discovered 10/17/2017. The weakness was disclosed 10/23/2017 (Website). The advisory is shared at becomepentester.blogspot.com. This vulnerability is known as CVE-2017-15580 since 10/17/2017. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known. MITRE ATT&CK project uses the attack technique T1608.002 for this issue.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 6 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:tickets.php it is possible to find vulnerable targets with Google Hacking. The commercial vulnerability scanner Qualys is able to test this issue with plugin 13232 (osTicket File Upload Restrictions Bypassed Vulnerability).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Exploit-DB (45169).

Productinfo

Type

• Ticket Tracking Software

Name

• osTicket

Version

• 1.10.1

License

• open-source

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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