PT-2018-11297 · Linux+1 · Linux Kernel+1
Pengfei Wang
·
Publicado
2018-06-22
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Atualizado
2019-03-14
·
CVE-2018-12633
CVSS v3.1
6.3
Média
| Vetor | AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 4.17.2
Description
An issue in the Linux kernel allows a malicious user thread to tamper with critical variables due to a race condition, leading to severe kernel errors such as buffer over-accesses. This can cause a local denial of service and information leakage. The issue is related to the
vbg misc device ioctl() function in drivers/virt/vboxguest/vboxguest linux.c, which reads user data twice with copy from user, allowing the header part of the user data to be double-fetched.Recommendations
For Linux kernel versions prior to 4.17.2, update to version 4.17.2 or later to resolve the issue. As a temporary workaround, consider restricting access to the
vbg misc device ioctl() function to minimize the risk of exploitation.Correção
DoS
Race Condition
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Enumeração de Fraquezas
Identificadores relacionados
Produtos afetados
Alt Linux
Linux Kernel