VDB
CVE-2018-18397
CVE-2018-18397
PUBLISHED
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.
EPSS 0.07% · 21.0th percentile
Risk Scores
EPSS Score
0.07%
21.0th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:14.04:LTS | linux-azure | *, *, 0 |
| Ubuntu:16.04:LTS | linux-gcp | *, 4.13.0-1006.9, 4.10.0-1004.4 |
| Ubuntu:18.04:LTS | linux-aws | 4.15.0-1029.30, 0, 4.15.0-1001.1 |
| Ubuntu:18.04:LTS | linux-oracle | 4.15.0-1007.9, 0, 4.15.0-1008.10 |
| Ubuntu:18.04:LTS | linux-gcp | 4.15.0-1019.20, 4.15.0-1018.19, 4.15.0-1017.18 |
| Ubuntu:18.04:LTS | linux-raspi2 | 0, 4.13.0-1005.5, 4.13.0-1006.6 |
| Ubuntu:18.04:LTS | linux | 4.15.0-43.46, 4.15.0-22.24, 4.15.0-20.21 |
| Ubuntu:18.04:LTS | linux-gcp-edge | *, 4.18.0-1006.7~18.04.1, 4.18.0-1005.6~18.04.1 |
| Ubuntu:16.04:LTS | linux-oracle | *, 0, 4.15.0-1008.10~16.04.1 |
| Ubuntu:18.04:LTS | linux-oem | 4.15.0-1002.3, 0, 4.15.0-1021.24 |
| Ubuntu:16.04:LTS | linux-aws-hwe | 4.15.0-1031.33~16.04.1, 0, 4.15.0-1030.31~16.04.1 |
| Ubuntu:18.04:LTS | linux-hwe | 4.18.0-13.14~18.04.1, 4.18.0-15.16~18.04.1, 4.18.0-14.15~18.04.1 |
| Ubuntu:18.04:LTS | linux-kvm | 4.15.0-1019.19, 4.15.0-1020.20, 4.15.0-1021.21 |
| Ubuntu:16.04:LTS | linux-hwe | 4.15.0-32.35~16.04.1, *, 4.15.0-39.42~16.04.1 |
| Ubuntu:16.04:LTS | linux-azure | *, 4.15.0-1039.43, 4.15.0-1037.39~16.04.1 |
| Ubuntu:18.04:LTS | linux-azure | 4.15.0-1036.38, 4.15.0-1037.39, 4.18.0-1011.11~18.04.1 |
Exploit Intelligence
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=29ec90660d68bbdd69507c1c8b4e33aa299278b1 (circl)
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.7 (circl)
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.87 (circl)
- https://github.com/torvalds/linux/commit/29ec90660d68bbdd69507c1c8b4e33aa299278b1 (circl)
- USN-3901-2 (circl)
- RHSA-2019:0324 (circl)
- USN-3903-2 (circl)
- RHSA-2019:0202 (circl)
- RHBA-2019:0327 (circl)
- RHSA-2019:0163 (circl)
…and 6 more exploits
Timeline
- Dec 12, 2018 CVE Published
- Dec 13, 2018 PoC Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Oct 26, 2021 EPSS Score
- Dec 27, 2021 EPSS Score
- Feb 28, 2022 EPSS Score
- May 2, 2022 EPSS Score
- Jul 3, 2022 EPSS Score
- Sep 5, 2022 EPSS Score
- Nov 6, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2018-18397 third-party-advisory
- https://lore.kernel.org/lkml/20181126173452.26955-2-aarcange@redhat.com/ third-party-advisory
- https://ubuntu.com/security/notices/USN-3901-1 vendor-advisory
- https://ubuntu.com/security/notices/USN-3901-2 vendor-advisory
- https://ubuntu.com/security/notices/USN-3903-1 vendor-advisory
- https://ubuntu.com/security/notices/USN-3903-2 vendor-advisory
- https://www.cve.org/CVERecord?id=CVE-2018-18397 third-party-advisory