HighPublic exploit

Privilege Escalation in Qualcomm MSM MDP Display Driver (mdp_lut_hw_update)

IdentifiersCVE-2014-4323CWE-20· Improper Input Validation

The mdp_lut_hw_update function in drivers/video/msm/mdp.c in the MDP display driver for Linux kernel 3.x, as used in Qualcomm Innovation Center (QuIC) Android contributions for MSM devices, fails to validate user-supplied start and length values in an ioctl call. This lack of input validation allows a local attacker to supply crafted values, potentially leading to privilege escalation via arbitrary memory access or modification.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

A local attacker can exploit this vulnerability by executing a crafted application that issues malicious ioctl calls to the vulnerable driver. This can result in privilege escalation, allowing the attacker to execute code with kernel-level privileges, potentially compromising the entire device.

Mitigation

If you can’t patch tonight, do this now.

Restrict access to the vulnerable device node to trusted users only. Employ SELinux or similar mandatory access controls to limit the ability of unprivileged users to interact with the affected driver. Monitor for suspicious activity involving ioctl calls to the MDP driver.

Remediation

Patch, then assume compromise.

Apply patches or updates provided by the vendor that address the input validation flaw in the mdp_lut_hw_update function. Ensure that all user-supplied parameters in ioctl calls are properly validated before use.

PUBLIC EXPLOITS

Exploits

1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.

VALID 1 / 1 TOTALView more in app

cve-2014-4323MaturityOperationalVerified exploit

This repository is a proof-of-concept (PoC) exploit for CVE-2014-4323, targeting a vulnerability in the MSM framebuffer driver on Android devices. The main exploit code is in 'jni/pwn.c', which is compiled via the provided Android.mk build script. The exploit works by leaking kernel addresses from debugfs, manipulating the framebuffer device via ioctl calls, and setting up a trampoline to execute a kernel payload. The payload escalates privileges to root by calling commit_creds(prepare_kernel_cred(0)), then spawns a root shell. The exploit requires local access to the device and the presence of specific device files and kernel debugfs entries. The repository contains minimal documentation and is structured for use as a PoC for researchers or security professionals.

marcograssDisclosed Oct 15, 2015cmakelocal

EXPOSURE SURFACE

Affected products & vendors

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VendorProductType

LinuxLinux Kerneloperating_system

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ACTIVITY FEED

Recent activity

No public activity tracked yet. Mallory keeps watching.

0 SOURCESView more in app

No public activity observed for this vulnerability.

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Exposure mapping

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Threat actor evidence

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Associated malware

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Detection signatures

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