Описание
Stack-based buffer overflow in the get_matching_model_microcode function in arch/x86/kernel/cpu/microcode/intel_early.c in the Linux kernel before 4.0 allows context-dependent attackers to gain privileges by constructing a crafted microcode header and leveraging root privileges for write access to the initrd.
A stack-based buffer overflow flaw was found in the Linux kernel's early load microcode functionality. On a system with UEFI Secure Boot enabled, a local, privileged user could use this flaw to increase their privileges to the kernel (ring0) level, bypassing intended restrictions in place.
Отчет
This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6 and Red Hat Enteprise MRG 2. Future kernel and kernel-rt updates for Red Hat Enterprise Linux 7 may address this issue.
Затронутые пакеты
Платформа | Пакет | Состояние | Рекомендация | Релиз |
---|---|---|---|---|
Red Hat Enterprise Linux 5 | kernel | Not affected | ||
Red Hat Enterprise Linux 6 | kernel | Not affected | ||
Red Hat Enterprise MRG 2 | kernel-rt | Not affected | ||
Red Hat Enterprise Linux 7 | kernel-rt | Fixed | RHSA-2015:1565 | 05.08.2015 |
Red Hat Enterprise Linux 7 | kernel | Fixed | RHSA-2015:1534 | 06.08.2015 |
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Дополнительная информация
Статус:
EPSS
6 Medium
CVSS2
Связанные уязвимости
Stack-based buffer overflow in the get_matching_model_microcode function in arch/x86/kernel/cpu/microcode/intel_early.c in the Linux kernel before 4.0 allows context-dependent attackers to gain privileges by constructing a crafted microcode header and leveraging root privileges for write access to the initrd.
Stack-based buffer overflow in the get_matching_model_microcode function in arch/x86/kernel/cpu/microcode/intel_early.c in the Linux kernel before 4.0 allows context-dependent attackers to gain privileges by constructing a crafted microcode header and leveraging root privileges for write access to the initrd.
Stack-based buffer overflow in the get_matching_model_microcode functi ...
Stack-based buffer overflow in the get_matching_model_microcode function in arch/x86/kernel/cpu/microcode/intel_early.c in the Linux kernel before 4.0 allows context-dependent attackers to gain privileges by constructing a crafted microcode header and leveraging root privileges for write access to the initrd.
ELSA-2015-1534: kernel security and bug fix update (MODERATE)
EPSS
6 Medium
CVSS2