CVE-2016-9104: Integer Overflow
First published: Fri Dec 09 2016(Updated: )
Multiple integer overflows in the (1) v9fs_xattr_read and (2) v9fs_xattr_write functions in hw/9pfs/9p.c in QEMU (aka Quick Emulator) allow local guest OS administrators to cause a denial of service (QEMU process crash) via a crafted offset, which triggers an out-of-bounds access.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| QEMU KVM | <=2.7.1 | |
| Debian GNU/Linux | =8.0 | |
| openSUSE | =42.2 |
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Reference Links
- http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html
- http://www.openwall.com/lists/oss-security/2016/10/28/2
- http://www.openwall.com/lists/oss-security/2016/10/30/8
- http://www.securityfocus.com/bid/93956
- https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
- https://lists.gnu.org/archive/html/qemu-devel/2016-10/msg02942.html
- https://security.gentoo.org/glsa/201611-11
Frequently Asked Questions
What is the severity of CVE-2016-9104?
CVE-2016-9104 has a medium severity level as it allows local guest OS administrators to cause a denial of service.
How do I fix CVE-2016-9104?
To fix CVE-2016-9104, update QEMU to a version newer than 2.7.1 where the vulnerability is addressed.
What systems are affected by CVE-2016-9104?
CVE-2016-9104 affects QEMU versions up to 2.7.1, Debian 8.0, and openSUSE Leap 42.2.
What kind of attack does CVE-2016-9104 enable?
CVE-2016-9104 enables a denial of service attack by allowing a process crash through integer overflow.
Who can exploit CVE-2016-9104?
CVE-2016-9104 can be exploited by local guest OS administrators with the ability to craft specific offsets.
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- agent/tags
- agent/softwarecombine
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/qemu
- canonical/qemu kvm
- version/qemu kvm/2.7.1
- vendor/debian
- canonical/debian gnu/linux
- version/debian gnu/linux/8.0
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- canonical/opensuse
- version/opensuse/42.2