#VU1008 Denial of service in Linux kernel - CVE-2016-8658

Vulnerability identifier: #VU1008

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-8658

CWE-ID: CWE-121

Exploitation vector: Local

Exploit availability: No

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

Vendor: Linux Foundation

Description
The vulnerability allows a local user to cause DoS conditions on the target system.
The weakness exists due to stack-based buffer overfow in the brcmf_cfg80211_start_ap function in drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c. By using a long SSID Information Element in a command to a Netlink socket, attackers can trigger a system crash.
Successful exploitation of the vulnerability may result in denial of service and further attacks on the vulnerable system.

Mitigation
Update to version 4.7.5.

Vulnerable software versions

Linux kernel: 3.2.78-1 - 3.2.81-1, 3.14.72 - 3.16.7-ckt25-2+deb8u3 , 4.0.1 - 4.0.9, 4.1.1 - 4.1.34, 4.2.1 - 4.2.8, 4.3.1 - 4.3.6, 4.4.1 - 4.4.25, 4.5.1 - 4.5.7, 4.6.1 - 4.6.7, 4.7.1 - 4.7.5

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=1384403

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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.