Race condition in Lenovo System Update (formerly ThinkVantage System Update) before 5.06.0034 uses world-writable permissions for the update files directory, which allows local users to gain privileges by writing to an update file after the signature is validated.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2234
Reference (s):
- BID:74634
- URL: http://www.securityfocus.com/bid/74634
- http://support.lenovo.com/us/en/product_security/lsu_privilege
- http://www.ioactive.com/pdfs/Lenovo_System_Update_Multiple_Privilege_Escalations.pdf
- SECTRACK:1032268