SB2019050605 - Multiple vulnerabilities in Atlassian Jira

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Cross-site scripting (CVE-ID: CVE-2018-20824)

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

2) Cross-site scripting (CVE-ID: CVE-2018-20827)

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

The vulnerability exists in the activity stream gadget due to insufficient sanitization of user-supplied data in the "country" parameter. 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.

Remediation

Install update from vendor's website.

References

• https://jira.atlassian.com/browse/JRASERVER-69238
• https://jira.atlassian.com/browse/JRASERVER-69237