ID CVE-2015-2234
Summary 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.
References
Vulnerable Configurations
  • cpe:2.3:a:lenovo:system_update:-:*:*:*:*:*:*:*
    cpe:2.3:a:lenovo:system_update:-:*:*:*:*:*:*:*
  • cpe:2.3:a:lenovo:system_update:5.06.0027:*:*:*:*:*:*:*
    cpe:2.3:a:lenovo:system_update:5.06.0027:*:*:*:*:*:*:*
CVSS
Base: 6.9 (as of 03-01-2017 - 02:59)
Impact:
Exploitability:
CWE CWE-362
CAPEC
  • Leveraging Race Conditions
    The adversary targets a race condition occurring when multiple processes access and manipulate the same resource concurrently, and the outcome of the execution depends on the particular order in which the access takes place. The adversary can leverage a race condition by "running the race", modifying the resource and modifying the normal execution flow. For instance, a race condition can occur while accessing a file: the adversary can trick the system by replacing the original file with his version and cause the system to read the malicious file.
  • Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions
    This attack targets a race condition occurring between the time of check (state) for a resource and the time of use of a resource. A typical example is file access. The adversary can leverage a file access race condition by "running the race", meaning that they would modify the resource between the first time the target program accesses the file and the time the target program uses the file. During that period of time, the adversary could replace or modify the file, causing the application to behave unexpectedly.
Access
VectorComplexityAuthentication
LOCAL MEDIUM NONE
Impact
ConfidentialityIntegrityAvailability
COMPLETE COMPLETE COMPLETE
cvss-vector via4 AV:L/AC:M/Au:N/C:C/I:C/A:C
refmap via4
bid 74634
confirm http://support.lenovo.com/us/en/product_security/lsu_privilege
misc http://www.ioactive.com/pdfs/Lenovo_System_Update_Multiple_Privilege_Escalations.pdf
sectrack 1032268
Last major update 03-01-2017 - 02:59
Published 12-05-2015 - 19:59
Last modified 03-01-2017 - 02:59
Back to Top