Описание
A vulnerability was discovered in Samba, where the flaw allows SMB clients to truncate files, even with read-only permissions when the Samba VFS module "acl_xattr" is configured with "acl_xattr:ignore system acls = yes". The SMB protocol allows opening files when the client requests read-only access but then implicitly truncates the opened file to 0 bytes if the client specifies a separate OVERWRITE create disposition request. The issue arises in configurations that bypass kernel file system permissions checks, relying solely on Samba's permissions.
| Релиз | Статус | Примечание |
|---|---|---|
| bionic | ignored | end of standard support |
| devel | released | 2:4.18.6+dfsg-1ubuntu2.1 |
| esm-infra-legacy/trusty | needs-triage | |
| esm-infra/bionic | needs-triage | |
| esm-infra/focal | not-affected | 2:4.15.13+dfsg-0ubuntu0.20.04.6 |
| esm-infra/xenial | needs-triage | |
| focal | released | 2:4.15.13+dfsg-0ubuntu0.20.04.6 |
| jammy | released | 2:4.15.13+dfsg-0ubuntu1.5 |
| lunar | released | 2:4.17.7+dfsg-1ubuntu2.3 |
| mantic | released | 2:4.18.6+dfsg-1ubuntu2.1 |
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6.5 Medium
CVSS3
Связанные уязвимости
A vulnerability was discovered in Samba, where the flaw allows SMB clients to truncate files, even with read-only permissions when the Samba VFS module "acl_xattr" is configured with "acl_xattr:ignore system acls = yes". The SMB protocol allows opening files when the client requests read-only access but then implicitly truncates the opened file to 0 bytes if the client specifies a separate OVERWRITE create disposition request. The issue arises in configurations that bypass kernel file system permissions checks, relying solely on Samba's permissions.
A vulnerability was discovered in Samba, where the flaw allows SMB clients to truncate files, even with read-only permissions when the Samba VFS module "acl_xattr" is configured with "acl_xattr:ignore system acls = yes". The SMB protocol allows opening files when the client requests read-only access but then implicitly truncates the opened file to 0 bytes if the client specifies a separate OVERWRITE create disposition request. The issue arises in configurations that bypass kernel file system permissions checks, relying solely on Samba's permissions.
A vulnerability was discovered in Samba, where the flaw allows SMB cli ...
A vulnerability was discovered in Samba, where the flaw allows SMB clients to truncate files, even with read-only permissions when the Samba VFS module "acl_xattr" is configured with "acl_xattr:ignore system acls = yes". The SMB protocol allows opening files when the client requests read-only access but then implicitly truncates the opened file to 0 bytes if the client specifies a separate OVERWRITE create disposition request. The issue arises in configurations that bypass kernel file system permissions checks, relying solely on Samba's permissions.
6.5 Medium
CVSS3