Linux Kernel Qualcomm Innovation Center (QuIC) Android gain privileges

2014.12.14
Credit: quicinc
Risk: High
Local: Yes
Remote: No
CWE: CWE-20


CVSS Base Score: 7.5/10
Impact Subscore: 6.4/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

Release Date December 11, 2014 Affected Projects: Android for MSM Firefox OS for MSM QRD Android Advisory ID QCIR-2014-00007-1 CVE ID(s) CVE-2014-4323 Description The following security vulnerability has been identified in the implementation of the MDP display driver for Android: CVE-2014-4323: The MDP display driver provides an ioctl system call interface to user space clients for communication. When processing this communication, the mdp_lut_hw_update function uses the user-supplied values start and len from an fb_cmap structure for write operations without any boundary checks. A local application with graphics privileges can access the MDP display device node and use this to, e.g., elevate privileges. Access Vector: local Security Risk: high Vulnerability: CWE-20 (Improper input validation) Affected versions All active branches of the MSM kernel for Android on CAF are affected. The driver itself is only used on the following chipsets: 8064/8960/8660/8x30/7x30. Patch We advise customers to apply the following patches: https://www.codeaurora.org/cgit/quic/la//kernel/msm-3.10/commit/?id=014fa8def84c62893fa016e873c12de1da498603 Acknowledgement Qualcomm Innovation Center, Inc. (QuIC) thanks Gal Beniamini for reporting the related issues and working with QuIC to help improve Android device security. Revisions Initial revision. Contact security-advisory@quicinc.com

References:

https://www.codeaurora.org/cgit/quic/la//kernel/msm-3.10/commit/?id=014fa8def84c62893fa016e873c12de1da498603
https://www.codeaurora.org/projects/security-advisories/improper-input-validation-mdp-driver-when-processing-color-maps


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