CVE-2017-2584
Vulnerability Summary
Timeline
Description
arch/x86/kvm/emulate.c in the Linux kernel through 4.9.3 allows local users to obtain sensitive information from kernel memory or cause a denial of service (use-after-free) via a crafted application that leverages instruction emulation for fxrstor, fxsave, sgdt, and sidt.
CVSS Metrics
- v3.0•HIGH•Score: 7.1CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- v2.0•LOW•Score: 3.6AV:L/AC:L/Au:N/C:P/I:N/A:P
EPSS Trends
Current EPSS score: 0.09%• Percentile: 25%
Techniques & Countermeasures
- CWE-200•Exposure of Sensitive Information to an Unauthorized Actor
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
- CWE-416•Use After Free
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
Affected Systems
- linux•linux_kernel
≤ 4.9.3
References (8)
- http://www.securityfocus.com/bid/95430
- http://www.securitytracker.com/id/1037603
- https://usn.ubuntu.com/3754-1/
- https://github.com/torvalds/linux/commit/129a72a0d3c8e139a04512325384fe5ac119e74d
- http://www.debian.org/security/2017/dsa-3791
- http://www.openwall.com/lists/oss-security/2017/01/13/7
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=129a72a0d3c8e139a04512325384fe5ac119e74d
- https://bugzilla.redhat.com/show_bug.cgi?id=1413001