Workaround for CVE-2019-15004

Summary

Solution

Problem

Affected Jira Service Management versions in CVE-2019-15004 will allow non-application access users - Service Management Customers to see restricted information in the Jira instance.

This affects Jira Service Management portals that have the "Anyone can email the service project or raise a request in the portal" setting enabled, exploitation allows an attacker to view all issues within all Jira projects contained in the vulnerable instance.

Affected versions

• All versions before 3.9.17

• 3.10.x

• 3.11.x

• 3.12.x

• 3.13.x

• 3.14.x

• 3.15.x

• 3.16.x before 3.16.11 (the fixed version for 3.16.x)

• 4.0.x

• 4.1.x

• 4.2.x before 4.2.6 (the fixed version for 4.2.x)

• 4.3.x before 4.3.5 (the fixed version for 4.3.x)

• 4.4.x before 4.4.3 (the fixed version for 4.4.x)

• 4.5.x before 4.5.1 (the fixed version for 4.5.x)

Permanent resolution below along with workarounds if immediate upgrade is not possible

Resolution

Upgrade to fixed version of Jira Service Management

• 3.9.17

• 3.16.11

• 4.2.6

• 4.3.5

• 4.4.3

• 4.5.1

Workaround

Block path traversals and authorization byppass.

Workaround 1.

Redirect requests to Jira containing .. to a safe URL

1. Add the following to the <urlrewrite>section of [jira-installation-directory]/atlassian-jira/WEB-INF/urlrewrite.xml:

   1 2 3 4 <rule> <from>(?s)^/.*\.\..*$</from> <to type="temporary-redirect">/</to> </rule>

2. Save the urlrewrite.xml

3. Restart Jira

Workaround 2.

Block requests to Jira for path traversal at the reverse proxy or load balancer level

Apache

1. Add the following into the .conf file that contains the virtualhost that proxies to Jira

   1 2 3 4 <LocationMatch "/(.*\.\.)"> Order Allow,Deny Deny from all </LocationMatch>

   example below -

   1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 <VirtualHost *:80> ServerName jira.example.com ProxyRequests Off ProxyVia Off <Proxy *> Require all granted </Proxy> ProxyPass /jira http://ipaddress:8080/jira ProxyPassReverse /jira http://ipaddress:8080/jira <LocationMatch "/(.*\.\.)"> Order Allow,Deny Deny from all </LocationMatch>  </VirtualHost>

2. Restart your Apache proxy

Nginx

1. Add the following into the .conf file that contains the server block that proxies to Jira inside location block

   1 if ($uri ~* "/.*\.\."){ return 405;}

   example below -

   1 2 3 4 5 6 7 8 9 location /jira { proxy_set_header X-Forwarded-Host $host; proxy_set_header X-Forwarded-Server $host; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_pass http://ipaddress:8080/jira; client_max_body_size 10M; if ($uri ~* "/.*\.\."){ return 405;}  }

2. Restart your NGINX