CVE-2019-18675: Integer Overflow
First published: Mon Nov 25 2019(Updated: )
The Linux kernel through 5.3.13 has a start_offset+size Integer Overflow in cpia2_remap_buffer in drivers/media/usb/cpia2/cpia2_core.c because cpia2 has its own mmap implementation. This allows local users (with /dev/video0 access) to obtain read and write permissions on kernel physical pages, which can possibly result in a privilege escalation.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <3.16.60 | |
| Linux Linux kernel | >=3.17<3.18.113 | |
| Linux Linux kernel | >=3.19<4.4.137 | |
| Linux Linux kernel | >=4.5<4.9.108 | |
| Linux Linux kernel | >=4.10<4.14.49 | |
| Linux Linux kernel | >=4.15<4.16.15 |
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Reference Links
- https://deshal3v.github.io/blog/kernel-research/mmap_exploitation
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=be83bbf806822b1b89e0a0f23cd87cddc409e429
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/drivers/media/usb/cpia2/cpia2_core.c
- https://security.netapp.com/advisory/ntap-20200103-0001/
Frequently Asked Questions
What is CVE-2019-18675?
CVE-2019-18675 is a vulnerability in the Linux kernel through 5.3.13 that allows local users with /dev/video0 access to obtain read and write permissions on kernel physical pages.
How severe is CVE-2019-18675?
CVE-2019-18675 has a severity rating of 7.8 (high).
What is the affected software for CVE-2019-18675?
The affected software for CVE-2019-18675 is the Linux kernel versions up to 5.3.13.
How can I fix CVE-2019-18675?
To fix CVE-2019-18675, update to a version of the Linux kernel that is higher than 5.3.13.
Where can I find more information about CVE-2019-18675?
More information about CVE-2019-18675 can be found in the references provided: https://deshal3v.github.io/blog/kernel-research/mmap_exploitation, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=be83bbf806822b1b89e0a0f23cd87cddc409e429, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/drivers/media/usb/cpia2/cpia2_core.c.
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