Multiple vulnerabilities in Atlassian Jira

Published: 2019-05-06 | Updated: 2019-09-25

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2018-20824 CVE-2018-20827
CWE-ID	CWE-79
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #1 is available.
Vulnerable software	Jira Software Client/Desktop applications / Other client software
Vendor	Atlassian

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

Updated 25.09.2019

Added vulnerability #2. Changed bulletin title.

1) Cross-site scripting

EUVDB-ID: #VU18396

Risk: Low

CVSSv4.0: 1.8 [CVSS:4.0/AV:L/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: CVE-2018-20824

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

Exploit availability: No

Description

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

The vulnerability exists due to insufficient sanitization of user-supplied data when processing data passed via the cyclePeriod parameter to WallboardServlet resource. 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.

Example:

http://[host]/plugins/servlet/Wallboard/?dashboardId=10102&dashboardId=10103&cyclePeriod=(function(){alert(document.cookie);return%2030000;})()&transitionFx=fadeZoom&random=false

Mitigation

Install update from vendor's website.

Vulnerable software versions

Jira Software: 7.7.0 - 7.13.0

CPE2.3

External links

https://jira.atlassian.com/browse/JRASERVER-69238

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.

2) Cross-site scripting

EUVDB-ID: #VU21324