Описание
In the Linux kernel before 5.7.8, fs/nfsd/vfs.c (in the NFS server) can set incorrect permissions on new filesystem objects when the filesystem lacks ACL support, aka CID-22cf8419f131. This occurs because the current umask is not considered.
A vulnerability was found in NFSv4.2 in the Linux kernel, where a server fails to correctly apply umask when creating a new object on filesystem without ACL support (for example, ext4 with the "noacl" mount option). This flaw allows a local attacker with a user privilege to cause a kernel information leak problem.
Меры по смягчению последствий
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel | Not affected | ||
| Red Hat Enterprise Linux 6 | kernel | Out of support scope | ||
| Red Hat Enterprise Linux 7 | kernel-alt | Will not fix | ||
| Red Hat Enterprise MRG 2 | kernel | Will not fix | ||
| Red Hat Enterprise Linux 7 | kernel-rt | Fixed | RHSA-2020:5441 | 15.12.2020 |
| Red Hat Enterprise Linux 7 | kernel | Fixed | RHSA-2020:5437 | 15.12.2020 |
| Red Hat Enterprise Linux 7.4 Advanced Update Support | kernel | Fixed | RHSA-2021:0760 | 09.03.2021 |
| Red Hat Enterprise Linux 7.4 Telco Extended Update Support | kernel | Fixed | RHSA-2021:0760 | 09.03.2021 |
| Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions | kernel | Fixed | RHSA-2021:0760 | 09.03.2021 |
| Red Hat Enterprise Linux 7.6 Extended Update Support | kernel | Fixed | RHSA-2021:0878 | 16.03.2021 |
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Дополнительная информация
Статус:
EPSS
7.1 High
CVSS3
Связанные уязвимости
In the Linux kernel before 5.7.8, fs/nfsd/vfs.c (in the NFS server) can set incorrect permissions on new filesystem objects when the filesystem lacks ACL support, aka CID-22cf8419f131. This occurs because the current umask is not considered.
In the Linux kernel before 5.7.8, fs/nfsd/vfs.c (in the NFS server) can set incorrect permissions on new filesystem objects when the filesystem lacks ACL support, aka CID-22cf8419f131. This occurs because the current umask is not considered.
In the Linux kernel before 5.7.8, fs/nfsd/vfs.c (in the NFS server) ca ...
In the Linux kernel before 5.7.8, fs/nfsd/vfs.c (in the NFS server) can set incorrect permissions on new filesystem objects when the filesystem lacks ACL support, aka CID-22cf8419f131. This occurs because the current umask is not considered.
EPSS
7.1 High
CVSS3