oss-security - CVE-2017-7518 Kernel: KVM: debug exception via syscall emulation

Follow @Openwall on Twitter for new release announcements and other news

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <alpine.LFD.2.20.1706231946010.19155@wniryva>
Date: Fri, 23 Jun 2017 19:48:13 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
Subject: CVE-2017-7518 Kernel: KVM: debug exception via syscall emulation

    Hello,

Linux kernel built with the Kernel-based Virtual Machine(CONFIG_KVM) support 
is vulnerable to an incorrect debug exception(#DB) error. It could occur while 
emulating a syscall instruction.

A user/process inside guest could use this flaw to potentially escalate their 
privileges inside guest.

Note: Linux guests are not affected.

Upstream patch:
---------------
   -> https://www.spinics.net/lists/kvm/msg151817.html

Reference:
----------
   -> https://bugzilla.redhat.com/show_bug.cgi?id=1464473
   -> https://www.spinics.net/lists/kvm/msg151819.html
   -> https://xenbits.xen.org/xsa/advisory-204.html

'CVE-2017-7518' has been assigned to this issue by Red Hat Inc.

Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
47AF CE69 3A90 54AA 9045 1053 DD13 3D32 FE5B 041F

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.