Cross-site scripting in sockjs-tornado Python server

1) Cross-site scripting

EUVDB-ID: #VU27878

Risk: Low

CVSSv4.0: 2 [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:P/U:Clear]

CVE-ID: N/A

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

Exploit availability: No

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 in the "HTMLFILE_HEAD" template. 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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

sockjs-tornado: 1.0.0 - 1.0.6

CPE2.3

• cpe:2.3:a:mrjoes:sockjs-tornado:1.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:mrjoes:sockjs-tornado:1.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:mrjoes:sockjs-tornado:1.0.6:*:*:*:*:*:*:*

External links

https://snyk.io/vuln/SNYK-PYTHON-SOCKJSTORNADO-568071
https://github.com/mrjoes/sockjs-tornado/commit/ab0f2d5ccf952b481a39318d690dc8d264ad9c50
https://github.com/mrjoes/sockjs-tornado/commit/902b19c4a2015f20e1e2be42c8451e971db41a61
https://github.com/mrjoes/sockjs-tornado/issues/116

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.