Spectre-BHB Vulnerability in Arm Cortex and Neoverse Processors
Summary
CVE-2022-23960: Certain Arm Cortex and Neoverse processors through 2022-03-08 do not properly restrict cache speculation, aka Spectre-BHB. Affects xen versions < 4.13.4-r3. Fixed in 4.13.4-r3. How to fix ↓
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Background
Arm Cortex and Neoverse processors are widely used in various computing devices. These processors provide high-performance capabilities for a range of applications. However, certain versions of these processors are vulnerable to a security issue known as Spectre-BHB. This vulnerability allows an attacker to exploit the shared branch history in the Branch History Buffer (BHB) to manipulate mispredicted branches and potentially obtain sensitive information through cache allocation.
Vulnerability Detail
The Spectre-BHB vulnerability affects certain versions of Arm Cortex and Neoverse processors. By leveraging the shared branch history in the BHB, an attacker can influence mispredicted branches. This manipulation can lead to cache allocation, which enables the attacker to access sensitive information. The vulnerability poses a risk to the confidentiality of data processed by the affected processors.
How To Fix
Minimum fixed version
4.13.4-r3
This is the first release that contains the fix.
sudo apk add --upgrade xenTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no specific workaround available for the Spectre-BHB vulnerability. It is essential to apply the official patches provided by Arm to ensure proper mitigation.
Conclusion
The Spectre-BHB vulnerability affects certain versions of Arm Cortex and Neoverse processors, allowing attackers to manipulate mispredicted branches and potentially access sensitive information. To mitigate this vulnerability, it is crucial to apply the official patches provided by Arm. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for xen →
FAQ
The Spectre-BHB vulnerability is a security issue that affects certain Arm Cortex and Neoverse processors. It allows an attacker to manipulate mispredicted branches by exploiting the shared branch history in the Branch History Buffer (BHB) and potentially gain access to sensitive information.
An attacker can exploit the Spectre-BHB vulnerability by leveraging the shared branch history in the BHB to influence mispredicted branches. By manipulating cache allocation, the attacker can obtain sensitive information.
The Spectre-BHB vulnerability can lead to the disclosure of sensitive information processed by the affected Arm Cortex and Neoverse processors. This can pose a risk to the confidentiality of data.
No, there is no specific workaround available for the Spectre-BHB vulnerability. It is crucial to apply the official patches provided by Arm to mitigate the risk.
Users should check for updates and patches from Arm, the manufacturer of the affected processors. Arm provides security updates to address the Spectre-BHB vulnerability.
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