CVE - CVE-2024-46695

CVE-ID
CVE-2024-46695	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: selinux,smack: don't bypass permissions check in inode_setsecctx hook Marek Gresko reports that the root user on an NFS client is able to change the security labels on files on an NFS filesystem that is exported with root squashing enabled. The end of the kerneldoc comment for __vfs_setxattr_noperm() states: * This function requires the caller to lock the inode's i_mutex before it * is executed. It also assumes that the caller will make the appropriate * permission checks. nfsd_setattr() does do permissions checking via fh_verify() and nfsd_permission(), but those don't do all the same permissions checks that are done by security_inode_setxattr() and its related LSM hooks do. Since nfsd_setattr() is the only consumer of security_inode_setsecctx(), simplest solution appears to be to replace the call to __vfs_setxattr_noperm() with a call to __vfs_setxattr_locked(). This fixes the above issue and has the added benefit of causing nfsd to recall conflicting delegations on a file when a client tries to change its security label.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/2dbc4b7bac60b02cc6e70d05bf6a7dfd551f9dda URL:https://git.kernel.org/stable/c/2dbc4b7bac60b02cc6e70d05bf6a7dfd551f9dda MISC:https://git.kernel.org/stable/c/459584258d47ec3cc6245a82e8a49c9d08eb8b57 URL:https://git.kernel.org/stable/c/459584258d47ec3cc6245a82e8a49c9d08eb8b57 MISC:https://git.kernel.org/stable/c/76a0e79bc84f466999fa501fce5bf7a07641b8a7 URL:https://git.kernel.org/stable/c/76a0e79bc84f466999fa501fce5bf7a07641b8a7 MISC:https://git.kernel.org/stable/c/eebec98791d0137e455cc006411bb92a54250924 URL:https://git.kernel.org/stable/c/eebec98791d0137e455cc006411bb92a54250924 MISC:https://git.kernel.org/stable/c/f71ec019257ba4f7ab198bd948c5902a207bad96 URL:https://git.kernel.org/stable/c/f71ec019257ba4f7ab198bd948c5902a207bad96 MISC:https://git.kernel.org/stable/c/fe0cd53791119f6287b6532af8ce41576d664930 URL:https://git.kernel.org/stable/c/fe0cd53791119f6287b6532af8ce41576d664930
Assigning CNA
kernel.org
Date Record Created
20240911	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240911)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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