Vulnerability in Kernel - crypto: ccp - Ensure psp_ret is always init'd in __sev_platform_init_locked()
Summary
GSD-2022-1001894: crypto: ccp - Ensure psp_ret is always init'd in __sev_platform_init_locked(). Affects Kernel versions >= c0713b3017a8057819173830dc273c8fec4b0b77, < 0e67b3e1f93a6d368ab0cebce5b3ef5e6af785a1. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that provides core functionalities and interfaces between hardware and software. It is responsible for managing system resources, facilitating communication between different software components, and ensuring the overall stability and security of the system. The crypto subsystem within the Kernel provides cryptographic services and algorithms for various security-related operations. One of the components in the crypto subsystem is the ccp (Cryptographic Coprocessor) module, which utilizes hardware acceleration for cryptographic operations. However, a vulnerability has been identified in the ccp module that can lead to potential security risks.
Vulnerability Detail
The vulnerability in the ccp module specifically affects the __sev_platform_init_locked() function. In certain scenarios, the variable 'psp_ret' is not properly initialized, which can result in uninitialized memory usage. This vulnerability could potentially be exploited by an attacker to gain unauthorized access, execute arbitrary code, or cause a denial-of-service condition. The impact and attack plausibility of this vulnerability have not yet been proven, but it is crucial to address it to ensure the security and integrity of the system.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can apply the patch provided in commit 0e67b3e1f93a6d368ab0cebce5b3ef5e6af785a1 manually. Here is the code snippet for the patch:
- u32 psp_ret;
+ u32 psp_ret = 0;
Conclusion
The vulnerability in the Kernel's ccp module can lead to potential security risks, including unauthorized access and arbitrary code execution. It is crucial to update the Linux Kernel to the latest version to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
The Kernel is a critical component of the Linux operating system that provides core functionalities and interfaces between hardware and software.
The crypto subsystem in the Kernel provides cryptographic services and algorithms for various security-related operations.
The ccp (Cryptographic Coprocessor) module is a component in the crypto subsystem that utilizes hardware acceleration for cryptographic operations.
The impact of this vulnerability is not yet proven, but it could potentially allow unauthorized access, arbitrary code execution, or denial-of-service attacks.
To fix this vulnerability, update the Linux Kernel to version v5.15.33 or later, which includes the necessary fix for the ccp module.
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