#VU40222 Buffer overflow in Debian Linux - CVE-2016-5728

Vulnerability identifier: #VU40222

Vulnerability risk: Low

CVSSv4.0: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-5728

CWE-ID: CWE-119

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Debian Linux
Operating systems & Components / Operating system

Vendor: Debian

Description

The vulnerability allows a local authenticated user to #BASIC_IMPACT#.

Race condition in the vop_ioctl function in drivers/misc/mic/vop/vop_vringh.c in the MIC VOP driver in the Linux kernel before 4.6.1 allows local users to obtain sensitive information from kernel memory or cause a denial of service (memory corruption and system crash) by changing a certain header, aka a "double fetch" vulnerability.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Debian Linux: 8.0

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External links
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9bf292bfca94694a721449e3fd752493856710f6
https://www.debian.org/security/2016/dsa-3616
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.1
https://www.securityfocus.com/archive/1/538802/30/0/threaded
https://www.ubuntu.com/usn/USN-3070-1
https://www.ubuntu.com/usn/USN-3070-2
https://www.ubuntu.com/usn/USN-3070-3
https://www.ubuntu.com/usn/USN-3070-4
https://www.ubuntu.com/usn/USN-3071-1
https://www.ubuntu.com/usn/USN-3071-2
https://bugzilla.kernel.org/show_bug.cgi?id=116651
https://github.com/torvalds/linux/commit/9bf292bfca94694a721449e3fd752493856710f6

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.