Incorrect Authorization Affecting kernel-default-livepatch package, versions <4.12.14-25.28.1
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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.
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Test your applications- Snyk IDSNYK-SLES150-KERNELDEFAULTLIVEPATCH-3253466
- published14 Apr 2022
- disclosed1 Feb 2019
Introduced: 1 Feb 2019
CVE-2018-18397 (opens in a new tab)How to fix?
Upgrade SLES:15.0 kernel-default-livepatch to version 4.12.14-25.28.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-default-livepatch package and not the kernel-default-livepatch package as distributed by SLES.
See How to fix? for SLES:15.0 relevant fixed versions and status.
The userfaultfd implementation in the Linux kernel before 4.19.7 mishandles access control for certain UFFDIO_ ioctl calls, as demonstrated by allowing local users to write data into holes in a tmpfs file (if the user has read-only access to that file, and that file contains holes), related to fs/userfaultfd.c and mm/userfaultfd.c.
References
- https://www.suse.com/security/cve/CVE-2018-18397.html
- https://bugzilla.suse.com/1117656
- https://bugzilla.suse.com/1171522
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=29ec90660d68bbdd69507c1c8b4e33aa299278b1
- https://access.redhat.com/errata/RHBA-2019:0327
- https://access.redhat.com/errata/RHSA-2019:0163
- https://access.redhat.com/errata/RHSA-2019:0202
- https://access.redhat.com/errata/RHSA-2019:0324
- https://access.redhat.com/errata/RHSA-2019:0831
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1700
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.87
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.7
- https://github.com/torvalds/linux/commit/29ec90660d68bbdd69507c1c8b4e33aa299278b1
- https://usn.ubuntu.com/3901-1/
- https://usn.ubuntu.com/3901-2/
- https://usn.ubuntu.com/3903-1/
- https://usn.ubuntu.com/3903-2/
- https://www.exploit-db.com/exploits/45983