Emergency Stack Path Vulnerability in powerpc/64s Kernel
Summary
UVI-2021-1001619: powerpc/64s: fix program check interrupt emergency stack path. Affects Kernel versions >= 0a882e28468f48ab3d9a36dde0a5723ea29ed1ed, < 411b38fe68ba20a8bbe724b0939762c3f16e16ca. No fix is published. How to fix ↓
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Background
The powerpc/64s kernel is a component of the Linux operating system that is specifically designed for powerpc 64-bit systems. It provides support for the powerpc architecture and enables the execution of programs on these systems. The emergency stack path is a critical part of the kernel that handles program check interrupts, which are triggered when a program encounters an error or exception. This vulnerability affects the emergency stack path in the powerpc/64s kernel.
Vulnerability Detail
The emergency stack path vulnerability in the powerpc/64s kernel allows an attacker to exploit a flaw in the handling of program check interrupts. By triggering a program check interrupt, an attacker can cause the kernel to execute arbitrary code or crash, potentially leading to a denial of service or privilege escalation. The vulnerability was introduced in version v5.3 of the Linux kernel and was fixed in version v5.10.73. The specific commit that addresses this issue is 411b38fe68ba20a8bbe724b0939762c3f16e16ca.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is necessary to apply the fix by updating the Linux kernel.
Conclusion
The emergency stack path vulnerability in the powerpc/64s kernel can be exploited to execute arbitrary code or crash the kernel. It is crucial to update the Linux kernel to version v5.10.73 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability allows an attacker to execute arbitrary code or crash the kernel, potentially leading to a denial of service or privilege escalation.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and the playground will analyze it for vulnerabilities.
At the time of this report, there is no known exploit for this vulnerability. However, it is important to apply the fix as soon as possible to mitigate the risk.
Yes, this vulnerability can be exploited remotely if the attacker can send a specially crafted program check interrupt to the target system.
The only effective mitigation for this vulnerability is to apply the fix by updating the Linux kernel to a version that includes the patch.
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