Use-after-Free Vulnerability in can: j1939 Package
Summary
GSD-2021-1001076: can: j1939: fix Use-after-Free, hold skb ref while in use. Affects Kernel versions >= 9d71dd0c70099914fcd063135da3c580865e924c, < 1071065eeb33d32b7d98c2ce7591881ae7381705. No fix is published. How to fix ↓
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Background
The can: j1939 package is a component of the Linux Kernel ecosystem. It provides support for the J1939 protocol, which is commonly used in heavy-duty vehicles for communication between various electronic control units (ECUs). The package allows ECUs to exchange messages over a Controller Area Network (CAN).
Vulnerability Detail
The identified vulnerability in the can: j1939 package is a Use-after-Free issue. This occurs when a reference to a memory object is used after it has been freed. In this case, the vulnerability arises from not holding a reference to a socket buffer (skb) while it is still in use. An attacker could potentially exploit this vulnerability to execute arbitrary code or cause a denial-of-service (DoS) condition.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No specific workaround has been mentioned for this vulnerability.
Conclusion
The can: j1939 package in the Linux Kernel is vulnerable to a Use-after-Free issue. It is crucial to update the Linux Kernel to version v5.12.13 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The can: j1939 package is a component of the Linux Kernel ecosystem that provides support for the J1939 protocol used in heavy-duty vehicles.
A Use-after-Free vulnerability occurs when a program uses a reference to a memory object after it has been freed.
This vulnerability could allow an attacker to execute arbitrary code or cause a denial-of-service (DoS) condition.
To fix this vulnerability, update the Linux Kernel to version v5.12.13 or later, which includes the necessary fix for the can: j1939 package.
No specific workaround has been provided for this vulnerability.
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