Apache Struts 2 Remote Code Execution (CVE-2017-5638)


*Description* Crowd used a version of Struts 2 that was vulnerable to [CVE-2017-5638|https://cwiki.apache.org/confluence/display/WW/S2-045]. Attackers can use this vulnerability to execute Java code of their choice on systems that have a vulnerable version of Crowd. *Affected versions:* * All versions of Crowd *from 2.8.3* before *2.9.7* (the fixed version for 2.9.x), from version *2.10.1* before *2.10.3* (the fixed version for 2.10.x) and from version *2.11.0* before *2.11.1* (the fixed version for 2.11.x) are affected by this vulnerability. *Fix:* * *Crowd* 2.11.1 is available for download from [https://www.atlassian.com/software/crowd/download]. * *Crowd* 2.10.3 is available for download from [https://www.atlassian.com/software/crowd/download-archive]. * *Crowd* 2.9.7 is available for download from [https://www.atlassian.com/software/crowd/download-archive].  *Hotfix:* The preferred fix is to upgrade Crowd to a version that's not vulnerable (see the *Fix* section). If you cannot schedule an upgrade immediately, and are using Crowd 2.10 or 2.11, you can replace the affected library as a temporary workaround. To replace the library: # Stop Crowd # Download [struts2-core-2.3.32.jar|https://maven.atlassian.com/content/groups/public/org/apache/struts/struts2-core/2.3.32/struts2-core-2.3.32.jar] # Remove all existing copies of struts2-core-2.3.29.jar: {code} ./crowd-openidclient-webapp/WEB-INF/lib/struts2-core-2.3.29.jar ./crowd-openidserver-webapp/WEB-INF/lib/struts2-core-2.3.29.jar ./crowd-webapp/WEB-INF/lib/struts2-core-2.3.29.jar ./demo-webapp/WEB-INF/lib/struts2-core-2.3.29.jar {code} # Copy the downloaded struts2-core-2.3.32.jar into each of the lib/ directories you removed the jar from # Restart Crowd This temporary solution is provided only for your convenience and an upgrade to an official Crowd release should be scheduled as soon as possible. For additional details see the [full advisory|https://confluence.atlassian.com/crowd/crowd-security-advisory-2017-03-10-876857916.html].

Affected Software

CPE Name Name Version
crowd 2.8.3
crowd 2.10.2
crowd 2.11.1
crowd 2.9.1
crowd 2.10.3
crowd 2.9.7
crowd 2.9.5
crowd 2.10.1
crowd 2.11.0