Android MSM camera driver for the Linux kernel 3.x Buffer Overflow

2014.01.14
Credit: quicinc
Risk: High
Local: No
Remote: Yes
CWE: CWE-129


CVSS Base Score: 6.9/10
Impact Subscore: 10/10
Exploitability Subscore: 3.4/10
Exploit range: Local
Attack complexity: Medium
Authentication: No required
Confidentiality impact: Complete
Integrity impact: Complete
Availability impact: Complete

Advisory ID QCIR-2014-00001-1 CVE ID(s) CVE-2013-6123 Description The following security vulnerabilities have been identified in the camera driver. CVE-2013-6123: The camera driver provides an ioctl system call interface to user space clients for communication. When processing this communication, the msm_ioctl_server, msm_server_send_ctrl, and msm_ctrl_cmd_done functions use a user-supplied value as an index to the server_queue array for read and write operations without any boundary checks. A local application with access to the camera device nodes can use this flaw to, e.g., elevate privileges. Access Vector: local Security Risk: high Vulnerability: CWE-129 (improper validation of array index) Affected versions All Android releases from CAF using Linux kernel from the following heads: jb_2.* kk_2* msm-3.0 Patch We advise customers to apply the following patches: Individual Patches msm_ioctl_server: https://www.codeaurora.org/gitweb/quic/la/?p=kernel/msm.git;a=commit;h=7beb04ea945a7178e61d935918d3cb152996b558 msm_ctrl_cmd_done/msm_server_send_ctrl: https://www.codeaurora.org/gitweb/quic/la/?p=kernel/msm.git;a=commit;h=60e4af06161d91d5aeaa04c7d6e9f4345a6acdd4 Acknowledgement Qualcomm Innovation Center, Inc. (QuIC) thanks alephzain1@gmail.com 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/projects/security-advisories/out-bounds-array-access-camera-driver-cve-2013-6123
https://www.codeaurora.org/cgit/quic/la//kernel/msm/commit/?id=7beb04ea945a7178e61d935918d3cb152996b558
https://www.codeaurora.org/cgit/quic/la//kernel/msm/commit/?id=60e4af06161d91d5aeaa04c7d6e9f4345a6acdd4


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