Description
upload_handler.php in the swfupload extension in Chyrp 2.0 and earlier relies on client-side JavaScript code to restrict the file extensions of uploaded files, which allows remote authenticated users to upload a .php file, and consequently execute arbitrary PHP code, via a write_post action to the default URI under admin/.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Chyrp 2.x swfupload Extension - 'upload_handler.php' Arbitrary File Upload / Arbitrary PHP Code Execution EDB-35947 · webapps · Jul 29, 2011 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- 8314 third-party-advisory
- http://www.justanotherhacker.com/advisories/JAHx113.txt
- 48672 vdb-entry
- [oss-security] 20110713 Re: [oCERT-2011-001] Chyrp input sanitization errors mailing-list
- [oss-security] 20110713 [oCERT-2011-001] Chyrp input sanitization errors mailing-list