Vulnerability in Kernel: Out-of-Bound Vmalloc Access in Imageblit
Summary
GSD-2021-1001539: tty: Fix out-of-bound vmalloc access in imageblit. Affects Kernel versions < 067c694d06040db6f0c65281bb358452ca6d85b9. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The Kernel is a critical component of the Linux operating system that manages the system's resources and facilitates communication between hardware and software. It provides essential functions for device drivers, process management, memory management, and more. The vulnerability identified in the Kernel involves an out-of-bound vmalloc access in the imageblit function. This function is responsible for copying image data from one location to another. The vulnerability could potentially allow an attacker to access sensitive information or execute arbitrary code in the kernel's memory space.
Vulnerability Detail
The vulnerability arises from an out-of-bound vmalloc access in the imageblit function of the Kernel. This access occurs when copying image data, potentially leading to memory corruption or information disclosure. An attacker could exploit this vulnerability to gain unauthorized access to sensitive data or execute arbitrary code with kernel-level privileges. The impact of this vulnerability depends on the attacker's capabilities and the specific context in which the Kernel is deployed. However, it is crucial to address this vulnerability promptly to mitigate the risk of potential attacks.
How To Fix
No fixed version is published for this vulnerability.
Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →
Workaround
As a workaround, users can apply patches or backports provided by the Linux distribution they are using. These patches may address the specific vulnerability and provide interim protection until a full Kernel update can be performed. It is recommended to consult the official documentation and support channels of the respective Linux distribution for guidance on applying patches or backports.
Conclusion
The vulnerability in the Kernel, involving an out-of-bound vmalloc access in the imageblit function, poses a potential risk of unauthorized access to sensitive data or arbitrary code execution. It is crucial to update the Linux Kernel to version v4.14.249 or later, which includes the necessary fix for this vulnerability. Applying patches or backports provided by the Linux distribution can serve as a temporary workaround. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
The impact of this vulnerability can vary depending on the attacker's capabilities and the specific context in which the Kernel is deployed. However, it could potentially allow unauthorized access to sensitive data or enable the execution of arbitrary code with kernel-level privileges.
You can use Vulert's playground at Vulert Scanner to check if your system is affected by this vulnerability. Vulert monitors and alerts in real-time for open-source vulnerabilities, using just a manifest file like package-lock.json.
At the time of this report, there is no known public exploit for this vulnerability. However, it is essential to address the vulnerability promptly to mitigate the risk of potential attacks.
Yes, users can apply patches or backports provided by their Linux distribution as a temporary workaround until a full Kernel update can be performed. Consult the official documentation and support channels of your Linux distribution for guidance on applying patches or backports.
For more detailed information about this vulnerability, including technical specifics and the fix implemented, please refer to the official source at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1001xxx/GSD-2021-1001539.json
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
