Bus-Off Recovery Vulnerability in SJA1000 CAN Controller Driver by Zephyr Project
CVE-2023-5563

7.5HIGH

Key Information:

Vendor

zephyrproject-rtos

Status
Zephyr
Vendor
CVE Published:
13 October 2023

What is CVE-2023-5563?

The SJA1000 CAN controller driver in the Zephyr Project contains a vulnerability wherein it attempts automatic recovery from a bus-off event while operating in IRQ context. When configured with CONFIG_CAN_AUTO_BUS_OFF_RECOVERY=y, this behavior triggers a call to k_sleep(), leading to a fatal exception and potential instability within the system. This issue highlights the importance of proper IRQ context management within device drivers.

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Affected Version(s)

Zephyr 3.3 <= 3.4

References

https://github.com/zephyrproject-rtos/zephyr/security/adv...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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