CVE-2017-15814 : Exploit Details and Defense Strategies

Android for MSM, Firefox OS for MSM, QRD Android, and all Android releases from CAF using the Linux kernel are affected by a potential vulnerability in the msm_flash_subdev_do_ioctl function.

Understanding CVE-2017-15814

This CVE involves an out-of-bounds read vulnerability in the msm_flash_subdev_do_ioctl function in certain Android platforms, potentially leading to local information disclosure.

What is CVE-2017-15814?

The vulnerability arises from inadequate input validation in the flash_data.cfg_type parameter, allowing for an out-of-bounds read when the value is CFG_FLASH_INIT. Exploiting this flaw could result in the disclosure of local information without requiring user interaction.

The Impact of CVE-2017-15814

Exploiting this vulnerability could lead to the disclosure of local information, requiring System execution privileges. Notably, this exploitation does not necessitate user interaction.

Technical Details of CVE-2017-15814

The technical details of this CVE include:

Vulnerability Description

The vulnerability exists in the msm_flash_subdev_do_ioctl function due to improper input validation of the flash_data.cfg_type parameter.

Affected Systems and Versions

Android for MSM
Firefox OS for MSM
QRD Android
All Android releases from CAF using the Linux kernel

Exploitation Mechanism

The vulnerability can be exploited by setting the flash_data.cfg_type parameter to CFG_FLASH_INIT, triggering an out-of-bounds read.

Mitigation and Prevention

To address CVE-2017-15814, consider the following mitigation strategies:

Immediate Steps to Take

Apply relevant security patches provided by the vendor
Monitor vendor security bulletins for updates

Long-Term Security Practices

Regularly update software and firmware to the latest versions
Implement proper input validation mechanisms in software development

Patching and Updates

Ensure timely installation of security patches and updates to mitigate the risk of exploitation.