RSS   Vulnerabilities for 'Fuchsia'   RSS

2022-05-03
 
CVE-2021-22556

CWE-190
 

 
The Security Team discovered an integer overflow bug that allows an attacker with code execution to issue memory cache invalidation operations on pages that they don�??t own, allowing them to control kernel memory from userspace. We recommend upgrading to kernel version 4.1 or beyond.

 
 
CVE-2022-0882

CWE-200
 

 
A bug exists where an attacker can read the kernel log through exposed Zircon kernel addresses without the required capability ZX_RSRC_KIND_ROOT. It is recommended to upgrade the Fuchsia kernel to 4.1.1 or greater.

 
2022-01-18
 
CVE-2021-22566

CWE-287
 

 
An incorrect setting of UXN bits within mmu_flags_to_s1_pte_attr lead to privileged executable pages being mapped as executable from an unprivileged context. This can be leveraged by an attacker to bypass executability restrictions of kernel-mode pages from user-mode. An incorrect setting of PXN bits within mmu_flags_to_s1_pte_attr lead to unprivileged executable pages being mapped as executable from a privileged context. This can be leveraged by an attacker to bypass executability restrictions of user-mode pages from kernel-mode. Typically this allows a potential attacker to circumvent a mitigation, making exploitation of potential kernel-mode vulnerabilities easier. We recommend updating kernel beyond commit 7d731b4e9599088ac3073956933559da7bca6a00 and rebuilding.

 

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