Vulnerability in Kernel Package: Staging: Greybus: UART: Fix TTY Use After Free
Summary
GSD-2021-1001575: staging: greybus: uart: fix tty use after free. Affects Kernel versions >= a18e15175708d39abbe9746ddc3479466b7800c3, < a5cfd51f6348e8fd7531461366946039c29c7e69. No fix is published. How to fix ↓
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Background
The Kernel package is a critical component of the Linux operating system, responsible for managing the system's core functionality. It provides an interface between the hardware and software layers, allowing applications to communicate with the underlying hardware. The Staging subsystem within the Kernel package includes experimental drivers that are not yet considered stable. The Greybus driver is one such component, providing support for the Greybus protocol used in certain devices. This vulnerability specifically affects the UART (Universal Asynchronous Receiver-Transmitter) functionality within the Greybus driver.
Vulnerability Detail
The identified vulnerability in the Staging: Greybus: UART component of the Kernel package involves a use-after-free issue in the TTY (Teletypewriter) subsystem. A use-after-free vulnerability occurs when a program continues to use a memory reference after it has been freed, leading to potential memory corruption or the execution of arbitrary code. In this case, the vulnerability arises from improper handling of TTY resources within the Greybus driver, which could be exploited by an attacker to gain unauthorized access, escalate privileges, or cause a denial-of-service condition.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No specific workaround has been provided for this vulnerability.
Conclusion
In conclusion, the Staging: Greybus: UART component of the Kernel package is vulnerable to a use-after-free issue in the TTY subsystem. This vulnerability can potentially be exploited to gain unauthorized access, escalate privileges, or cause a denial-of-service condition. It is crucial to update the Kernel package to version v4.19.209 or later to mitigate this vulnerability. For further support and assistance with vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability could potentially be exploited by an attacker to gain unauthorized access, escalate privileges, or cause a denial-of-service condition.
The vulnerability was introduced in version v4.9 of the Linux Kernel package and persists until version v4.19.208.
No evidence of active exploits targeting this vulnerability has been reported at this time.
As no specific workaround has been provided, it is recommended to prioritize updating the Kernel package to the fixed version as soon as possible.
More information about this vulnerability can be found in the Open Source Vulnerability database entry GSD-2021-1001575 at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1001xxx/GSD-2021-1001575.json.
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