Integer Overflow or Wraparound Affecting linux-4.9 package, versions <4.9.110-1~deb8u1
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.
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Test your applications- Snyk IDSNYK-DEBIAN8-LINUX49-263003
- published31 Mar 2018
- disclosed31 Mar 2018
Introduced: 31 Mar 2018
CVE-2017-18255 (opens in a new tab)How to fix?
Upgrade Debian:8 linux-4.9 to version 4.9.110-1~deb8u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream linux-4.9 package and not the linux-4.9 package as distributed by Debian.
See How to fix? for Debian:8 relevant fixed versions and status.
The perf_cpu_time_max_percent_handler function in kernel/events/core.c in the Linux kernel before 4.11 allows local users to cause a denial of service (integer overflow) or possibly have unspecified other impact via a large value, as demonstrated by an incorrect sample-rate calculation.
References
- https://security-tracker.debian.org/tracker/CVE-2017-18255
- https://lists.debian.org/debian-lts-announce/2018/07/msg00020.html
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1572e45a924f254d9570093abde46430c3172e3d
- https://github.com/torvalds/linux/commit/1572e45a924f254d9570093abde46430c3172e3d
- http://www.securityfocus.com/bid/103607
- https://usn.ubuntu.com/3696-1/
- https://usn.ubuntu.com/3696-2/
- https://usn.ubuntu.com/3754-1/