Incorrect Default Permissions Affecting reiserfs-kmp-coco package, versions <6.4.0-15061.6.coco15sp6.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about Incorrect Default Permissions vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-SLES156-REISERFSKMPCOCO-8170829
- published9 Oct 2024
- disclosed8 Oct 2024
Introduced: 8 Oct 2024
CVE-2024-46695 (opens in a new tab)How to fix?
Upgrade SLES:15.6 reiserfs-kmp-coco to version 6.4.0-15061.6.coco15sp6.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream reiserfs-kmp-coco package and not the reiserfs-kmp-coco package as distributed by SLES.
See How to fix? for SLES:15.6 relevant fixed versions and status.
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
- https://www.suse.com/security/cve/CVE-2024-46695.html
- https://bugzilla.suse.com/1230519
- https://git.kernel.org/stable/c/459584258d47ec3cc6245a82e8a49c9d08eb8b57
- https://git.kernel.org/stable/c/76a0e79bc84f466999fa501fce5bf7a07641b8a7
- https://git.kernel.org/stable/c/f71ec019257ba4f7ab198bd948c5902a207bad96
- https://git.kernel.org/stable/c/2dbc4b7bac60b02cc6e70d05bf6a7dfd551f9dda
- https://git.kernel.org/stable/c/eebec98791d0137e455cc006411bb92a54250924
- https://git.kernel.org/stable/c/fe0cd53791119f6287b6532af8ce41576d664930