Buffer overflow in Debian Linux

1) Buffer overflow

EUVDB-ID: #VU40222

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 - Memory corruption

Exploit availability: No

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

CPE2.3

• cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

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

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.