SB2021072816 - Multiple vulnerabilities in osTicket

Description

This security bulletin contains information about 3 vulnerabilities.

1) Cross-site scripting (CVE-ID: N/A)

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

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear

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

The vulnerability exists due to insufficient sanitization of user-supplied data when processing SVG images. A remote user can upload an SVG image with arbitrary HTML or JavaScript code inside and execute it 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.

2) Cross-site scripting (CVE-ID: N/A)

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

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear

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 in i18n. A remote attacker can trick the victim to follow a specially crafted link 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.

3) Improper control of interaction frequency (CVE-ID: N/A)

CWE-ID: CWE-799 - Improper Control of Interaction Frequency

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to absent anti-automation checks on tickets submission. A remote user can open arbitrary number of tickets by constantly refreshing the page in browser after successful ticket creation.

Remediation

Install update from vendor's website.

References

• https://github.com/osTicket/osTicket/releases/tag/v1.14.7
• https://github.com/osTicket/osTicket/releases/tag/v1.15.3
• https://github.com/osTicket/osTicket/commit/68dcaa2e54e763912097a48cf8e10faaa6081096
• https://github.com/osTicket/osTicket/commit/fd560df05868b770e113ec022c77f25d9df5e011