Vulnerability CVE-2015-3290
Published: 2015-08-31

Description:
arch/x86/entry/entry_64.S in the Linux kernel before 4.1.6 on the x86_64 platform improperly relies on espfix64 during nested NMI processing, which allows local users to gain privileges by triggering an NMI within a certain instruction window.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
Linux 3.3 NMIs Privilege Escalation
Andrew Lutomirsk...
10.08.2015

Type:

CWE-264

 (Permissions, Privileges, and Access Controls)

CVSS2 => (AV:L/AC:L/Au:N/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.2/10
10/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
Linux -> Linux kernel 

 References:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9b6e6a8334d56354853f9c255d1395c2ba570e0a
http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00011.html
http://www.debian.org/security/2015/dsa-3313
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.1.6
http://www.openwall.com/lists/oss-security/2015/07/22/7
http://www.openwall.com/lists/oss-security/2015/08/04/8
http://www.securityfocus.com/bid/76004
http://www.ubuntu.com/usn/USN-2687-1
http://www.ubuntu.com/usn/USN-2688-1
http://www.ubuntu.com/usn/USN-2689-1
http://www.ubuntu.com/usn/USN-2690-1
http://www.ubuntu.com/usn/USN-2691-1
https://bugzilla.redhat.com/show_bug.cgi?id=1243465
https://github.com/torvalds/linux/commit/9b6e6a8334d56354853f9c255d1395c2ba570e0a
https://www.exploit-db.com/exploits/37722/
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