Vulnerability CVE-2015-7891


Published: 2017-08-02   Modified: 2017-08-03

Description:
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.

CVSS2 => (AV:L/AC:M/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.4/10
6.4/10
3.4/10
Exploit range
Attack complexity
Authentication
Local
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Samsung -> Samsung mobile 

 References:
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/

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