Race condition in Samsung Mobile - CVE-2015-7891
Published: August 2, 2017 / Updated: August 9, 2020
Vulnerability identifier: #VU38609
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear
CVE-ID: CVE-2015-7891
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
Public exploit is available
Vendor: Samsung
Affected software:
Samsung Mobile
Samsung Mobile
Detailed vulnerability description
The vulnerability allows a local authenticated user to execute arbitrary code.
Race condition in the ioctl implementation in the Samsung Graphics 2D driver (aka /dev/fimg2d) in Samsung devices with Android L(5.0/5.1) allows local users to trigger memory errors by leveraging definition of g2d_lock and g2d_unlock lock macros as no-ops, aka SVE-2015-4598.
How to mitigate CVE-2015-7891
Install update from vendor's website.
Sources
- http://packetstormsecurity.com/files/134107/Samsung-Fimg2d-FIMG2D_BITBLT_BLIT-Ioctl-Concurrency-Flaw.html
- http://security.samsungmobile.com/smrupdate.html#SMR-OCT-2015
- http://www.securityfocus.com/bid/77335
- https://bugs.chromium.org/p/project-zero/issues/detail?id=492
- https://www.exploit-db.com/exploits/38557/