ed0e1e4d44
1979 changes to exploits/shellcodes Couchdb 1.5.0 - 'uuids' Denial of Service Apache CouchDB 1.5.0 - 'uuids' Denial of Service Beyond Remote 2.2.5.3 - Denial of Service (PoC) udisks2 2.8.0 - Denial of Service (PoC) Termite 3.4 - Denial of Service (PoC) SoftX FTP Client 3.3 - Denial of Service (PoC) Silverstripe 2.3.5 - Cross-Site Request Forgery / Open redirection SilverStripe CMS 2.3.5 - Cross-Site Request Forgery / Open Redirection Silverstripe CMS 3.0.2 - Multiple Vulnerabilities SilverStripe CMS 3.0.2 - Multiple Vulnerabilities Silverstripe CMS 2.4 - File Renaming Security Bypass SilverStripe CMS 2.4 - File Renaming Security Bypass Silverstripe CMS 2.4.5 - Multiple Cross-Site Scripting Vulnerabilities SilverStripe CMS 2.4.5 - Multiple Cross-Site Scripting Vulnerabilities Silverstripe CMS 2.4.7 - 'install.php' PHP Code Injection SilverStripe CMS 2.4.7 - 'install.php' PHP Code Injection Silverstripe Pixlr Image Editor - 'upload.php' Arbitrary File Upload SilverStripe CMS Pixlr Image Editor - 'upload.php' Arbitrary File Upload Silverstripe CMS 2.4.x - 'BackURL' Open Redirection SilverStripe CMS 2.4.x - 'BackURL' Open Redirection Silverstripe CMS - 'MemberLoginForm.php' Information Disclosure SilverStripe CMS - 'MemberLoginForm.php' Information Disclosure Silverstripe CMS - Multiple HTML Injection Vulnerabilities SilverStripe CMS - Multiple HTML Injection Vulnerabilities Apache CouchDB 1.7.0 and 2.x before 2.1.1 - Remote Privilege Escalation Apache CouchDB 1.7.0 / 2.x < 2.1.1 - Remote Privilege Escalation Monstra CMS before 3.0.4 - Cross-Site Scripting Monstra CMS < 3.0.4 - Cross-Site Scripting (2) Monstra CMS < 3.0.4 - Cross-Site Scripting Monstra CMS < 3.0.4 - Cross-Site Scripting (1) Navigate CMS 2.8 - Cross-Site Scripting Collectric CMU 1.0 - 'lang' SQL injection Joomla! Component CW Article Attachments 1.0.6 - 'id' SQL Injection LG SuperSign EZ CMS 2.5 - Remote Code Execution MyBB Visual Editor 1.8.18 - Cross-Site Scripting Joomla! Component AMGallery 1.2.3 - 'filter_category_id' SQL Injection Joomla! Component Micro Deal Factory 2.4.0 - 'id' SQL Injection RICOH Aficio MP 301 Printer - Cross-Site Scripting Joomla! Component Auction Factory 4.5.5 - 'filter_order' SQL Injection RICOH MP C6003 Printer - Cross-Site Scripting Linux/ARM - Egghunter (PWN!) + execve(_/bin/sh__ NULL_ NULL) Shellcode (28 Bytes) Linux/ARM - sigaction() Based Egghunter (PWN!) + execve(_/bin/sh__ NULL_ NULL) Shellcode (52 Bytes)
14 lines
No EOL
1.6 KiB
Text
14 lines
No EOL
1.6 KiB
Text
Oracle fixed some of the issues I reported in VirtualBox during the Oracle Critical Patch Update - April 2018. CVE-2018-2844 was an interesting double fetch vulnerability in VirtualBox Video Acceleration (VBVA) feature affecting Linux hosts. VBVA feature works on top of VirtualBox Host-Guest Shared Memory Interface (HGSMI), a shared memory implemented using Video RAM buffer. The VRAM buffer is at physical address 0xE0000000
|
|
|
|
I didn't see such optimization in VirtualBox for Windows and OSX. Only Linux hosts are affected.
|
|
|
|
Find a value in VBoxDD.so (assume as some fake jump table), which during relative address calculation will point into the 16MB shared VRAM buffer. For the proof-of-concept exploit fill the entire VRAM with NOP's and place the shellcode at the final pages of the mapping. No ASLR bypass is needed since the jump is relative.
|
|
|
|
In the guest, add vboxvideo to /etc/modprobe.d/blacklist.conf. vboxvideo.ko driver has a custom allocator to manage VRAM memory and HGSMI guest side implementations. Blacklisting vboxvideo reduces activity on VRAM and keeps the payload intact. The exploit was tested with Ubuntu Server as Guest and Ubuntu Desktop as host running VirtualBox 5.2.6.r120293.
|
|
|
|
The proof-of-concept exploit code with process continuation and connect back over network can be found at virtualbox-cve-2018-2844
|
|
|
|
https://www.voidsecurity.in/2018/08/from-compiler-optimization-to-code.html
|
|
https://github.com/renorobert/virtualbox-cve-2018-2844
|
|
|
|
Download: https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/45372.zip |