Linux Kernel up to 4.7.4 cfg80211.c brcmf_cfg80211_start_ap memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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5.9$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 4.7.4. Impacted is the function brcmf_cfg80211_start_ap of the file drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c. The manipulation leads to memory corruption. This vulnerability is referenced as CVE-2016-8658. The attack can only be performed from a local environment. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.7.4 (Operating System). It has been rated as problematic. This issue affects the function brcmf_cfg80211_start_ap of the file drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Stack-based buffer overflow in the brcmf_cfg80211_start_ap function in drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c in the Linux kernel before 4.7.5 allows local users to cause a denial of service (system crash) or possibly have unspecified other impact via a long SSID Information Element in a command to a Netlink socket.

The weakness was published 10/16/2016 with Tencent (Website). It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2016-8658 since 10/13/2016. The exploitation is known to be easy. Attacking locally is a requirement. Required for exploitation is a simple authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 95433 (Ubuntu 14.04 LTS : linux-lts-xenial vulnerabilities (USN-3146-2)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 169286 (OpenSuSE Security Update for the Linux Kernel (openSUSE-SU-2016:2583-1) (Dirty Cow)).

Upgrading to version 4.7.5 eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (95433) and SecurityFocus (BID 93541†). Similar entries are available at VDB-92733, VDB-92734 and VDB-93852. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.1
VulDB Temp Score: 5.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 95433
Nessus Name: Ubuntu 14.04 LTS : linux-lts-xenial vulnerabilities (USN-3146-2)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 802731
OpenVAS Name: Ubuntu Update for linux-lts-xenial USN-3146-2
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Kernel 4.7.5
Patch: git.kernel.org

Timelineinfo

10/12/2016 🔍
10/13/2016 +1 days 🔍
10/16/2016 +3 days 🔍
10/16/2016 +0 days 🔍
10/17/2016 +1 days 🔍
11/30/2016 +44 days 🔍
12/01/2016 +1 days 🔍
09/26/2022 +2125 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-3146-2
Organization: Tencent
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-8658 (🔍)
GCVE (CVE): GCVE-0-2016-8658
GCVE (VulDB): GCVE-100-92735
SecurityFocus: 93541 - Broadcom Wifi Driver 'brcmf_cfg80211_start_ap()' Function Stack Buffer Overflow Vulnerability

See also: 🔍

Entryinfo

Created: 10/17/2016 10:26
Updated: 09/26/2022 11:38
Changes: 10/17/2016 10:26 (69), 05/11/2019 07:43 (14), 09/26/2022 11:31 (4), 09/26/2022 11:38 (1)
Complete: 🔍
Cache ID: 216:4D9:103

Be aware that VulDB is the high quality source for vulnerability data.

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