Cross-site scripting in sks-keyservers.net SKS Keyserver

1) Cross-site scripting

EUVDB-ID: #VU41706

Risk: Low

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

CVE-ID: CVE-2014-3207

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

Exploit availability: No

Description

Vulnerability allows a remote attacker to perform Cross-site scripting attacks.

An input validation error exists in wserver.ml in SKS Keyserver before 1.1.5 when processing PATH_INFO to pks/lookup/undefined1. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in victim's browser in security 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

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

SKS Keyserver: 0.1.0 - 1.1.3

External links

http://secunia.com/advisories/57965
http://www.securityfocus.com/bid/67198
http://bitbucket.org/skskeyserver/sks-keyserver/commits/88d453cdc858d1352c61a4d4a6cd5b1ac17f2724
http://bitbucket.org/skskeyserver/sks-keyserver/issue/26/unfiltered-xss
http://bugzilla.mozilla.org/show_bug.cgi?id=952077

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.