CVE Vulnerabilities

CVE-2017-0462

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Published: Apr 07, 2017 | Modified: Apr 20, 2025
CVSS 3.x
7
HIGH
Source:
NVD
CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.x
7.6 HIGH
AV:N/AC:H/Au:N/C:C/I:C/A:C
RedHat/V2
RedHat/V3
Ubuntu
HIGH

An elevation of privilege vulnerability in the Qualcomm Seemp driver could enable a local malicious application to execute arbitrary code within the context of the kernel. This issue is rated as High because it first requires compromising a privileged process. Product: Android. Versions: Kernel-3.18. Android ID: A-33353601. References: QC-CR#1102288.

Weakness

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Affected Software

Name Vendor Start Version End Version
Linux_kernel Linux 3.18 (including) 3.18 (including)
Linux-armadaxp Ubuntu precise *
Linux-flo Ubuntu trusty *
Linux-flo Ubuntu vivid/stable-phone-overlay *
Linux-flo Ubuntu xenial *
Linux-flo Ubuntu yakkety *
Linux-goldfish Ubuntu trusty *
Linux-grouper Ubuntu trusty *
Linux-linaro-omap Ubuntu precise *
Linux-linaro-shared Ubuntu precise *
Linux-linaro-vexpress Ubuntu precise *
Linux-lts-quantal Ubuntu precise *
Linux-lts-quantal Ubuntu precise/esm *
Linux-lts-raring Ubuntu precise *
Linux-lts-raring Ubuntu precise/esm *
Linux-lts-saucy Ubuntu precise *
Linux-lts-saucy Ubuntu precise/esm *
Linux-lts-utopic Ubuntu trusty *
Linux-lts-wily Ubuntu trusty *
Linux-maguro Ubuntu trusty *
Linux-mako Ubuntu trusty *
Linux-mako Ubuntu vivid/stable-phone-overlay *
Linux-mako Ubuntu xenial *
Linux-mako Ubuntu yakkety *
Linux-manta Ubuntu trusty *
Linux-qcm-msm Ubuntu precise *
Linux-raspi2 Ubuntu vivid/ubuntu-core *
Linux-ti-omap4 Ubuntu precise *

Extended Description

A race condition occurs within concurrent environments, and it is effectively a property of a code sequence. Depending on the context, a code sequence may be in the form of a function call, a small number of instructions, a series of program invocations, etc. A race condition violates these properties, which are closely related:

A race condition exists when an “interfering code sequence” can still access the shared resource, violating exclusivity. The interfering code sequence could be “trusted” or “untrusted.” A trusted interfering code sequence occurs within the product; it cannot be modified by the attacker, and it can only be invoked indirectly. An untrusted interfering code sequence can be authored directly by the attacker, and typically it is external to the vulnerable product.

Potential Mitigations

  • Minimize the usage of shared resources in order to remove as much complexity as possible from the control flow and to reduce the likelihood of unexpected conditions occurring.
  • Additionally, this will minimize the amount of synchronization necessary and may even help to reduce the likelihood of a denial of service where an attacker may be able to repeatedly trigger a critical section (CWE-400).

References