Incomplete cleanup in specific special register write operations for some Intel(R) Processors
Summary
CVE-2022-21166: Incomplete cleanup in specific special register write operations for some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access. Affects xen versions < 4.14.5-r2. Fixed in 4.14.5-r2. How to fix ↓
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Background
The package under scrutiny is Xen, which is an open-source hypervisor that provides virtualization services for x86-compatible computers. It allows multiple guest operating systems to run concurrently on a single physical machine. Xen is widely used in cloud computing environments and virtualization platforms. This vulnerability affects certain versions of Xen running on Alpine Linux distributions (v3.13 to v3.18).
Vulnerability Detail
The vulnerability, identified as CVE-2022-21166, stems from incomplete cleanup in specific special register write operations for some Intel(R) Processors. An authenticated user with local access can exploit this vulnerability to potentially enable information disclosure. The exact mechanism of information disclosure is not specified, but it poses a risk to the confidentiality of sensitive data. The vulnerability has a CVSSv3 score of 5.5, indicating a moderate severity level.
How To Fix
Minimum fixed version
4.14.5-r2
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
No specific workaround has been provided for this vulnerability.
Conclusion
The vulnerability CVE-2022-21166 in Xen on Alpine Linux distributions poses a moderate risk of information disclosure. It is crucial to update the Xen package to the fixed versions mentioned above to mitigate this vulnerability. For further support on vulnerability remediation, contact DevNack.com.
See every vulnerability recorded for xen →
FAQ
Xen is an open-source hypervisor that provides virtualization services for x86-compatible computers. It allows multiple guest operating systems to run concurrently on a single physical machine.
The vulnerability allows an authenticated user with local access to potentially enable information disclosure. This could lead to the exposure of sensitive data.
The vulnerability affects Xen versions running on Alpine Linux distributions v3.13 to v3.18.
The CVSSv3 score of this vulnerability is 5.5, indicating a moderate severity level.
To fix this vulnerability, update the Xen package to the fixed versions: 4.14.5-r2 for Alpine Linux v3.13 and 4.15.2-r2 for Alpine Linux v3.14 to v3.18.
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