Medium [CVE-2018-13405 +1] Kernel: security regression for CVE-2018-13405
This medium-severity Red Hat Linux advisory covers CVE-2018-13405 and CVE-2021-4037 affecting kernel, Red Hat Enterprise Linux 8.4 Extended Update Support.
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Summary
A vulnerability was found in the fs/inode.c:inode_init_owner() function logic of the LInux kernel that allows local users to create files for the XFS file-system with an unintended group ownership and with group execution and SGID permission bits set, in a scenario where a directory is SGID and belongs to a certain group and is writable by a user who is not a member of this group.
This can lead to excessive permissions granted in case when they should not. This vulnerability is similar to the previous CVE-2018-13405 and adds the missed fix for the XFS.
Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 8.4 Extended Update Support.
- kernel before 5.4.241
- kernel 5.5 before 5.10.146
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
- 5.4.241
- 5.10.146
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation
Upgrade to a fixed release: 5.4.241, 5.10.146. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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