Published:2015/05/01  Last Updated:2015/05/01

JVN#07538357
EasyCTF vulnerable to cross-site scripting

Overview

EasyCTF contains a cross-site scripting vulnerability.

Products Affected

  • EasyCTF-1.3 and earlier

Description

EasyCTF is a server side CGI used to score CTF (Capture The Flag). EasyCTF contains a cross-site scripting vulnerability (CWE-79) that can be leveraged by an attacker created account.

Impact

An arbitrary script may be executed on the user's web browser.

Solution

Update the Software
Update to the latest version according to the information provided by the developer.

Vendor Status

Vendor Status Last Update Vendor Notes
Hiroaki Sakai Vulnerable 2015/05/01 Hiroaki Sakai website

References

JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2015.05.01 (CVSS Base Metrics)

What is CVSS?

Measures Severity Description
Access Vector(AV) Local (L) Adjacent Network (A) Network (N) A vulnerability exploitable with network access means the vulnerable software is bound to the network stack and the attacker does not require local network access or local access. Such a vulnerability is often termed "remotely exploitable".
Access Complexity(AC) High (H) Medium (M) Low (L) The access conditions are somewhat specialized.
Authentication(Au) Multiple (M) Single (S) None (N) The vulnerability requires an attacker to be logged into the system (such as at a command line or via a desktop session or web interface).
Confidentiality Impact(C) None (N) Partial (P) Complete (C) There is no impact to the confidentiality of the system.
Integrity Impact(I) None (N) Partial (P) Complete (C) Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.
Availability Impact(A) None (N) Partial (P) Complete (C) There is no impact to the availability of the system.

Base Score:3.5

Credit

Shoji Baba reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

Other Information

JPCERT Alert
JPCERT Reports
CERT Advisory
CPNI Advisory
TRnotes
CVE CVE-2015-0913
JVN iPedia JVNDB-2015-000061