Broadcom Wi-Fi HardMAC SoC 802.11r Authentication Response memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.5$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Broadcom Wi-Fi HardMAC SoC. Impacted is an unknown function of the component 802.11r Authentication Response Handler. The manipulation results in memory corruption. This vulnerability is cataloged as CVE-2017-6956. The attack must originate from the local network. There is no exploit available.

Detailsinfo

A vulnerability classified as critical has been found in Broadcom Wi-Fi HardMAC SoC (affected version unknown). Affected is an unknown functionality of the component 802.11r Authentication Response Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

On the Broadcom Wi-Fi HardMAC SoC with fbt firmware, a stack buffer overflow occurs when handling an 802.11r (FT) authentication response, leading to remote code execution via a crafted access point that sends a long R0KH-ID field in a Fast BSS Transition Information Element (FT-IE).

The bug was discovered 04/02/2017. The weakness was shared 04/05/2017 (Website). The advisory is shared for download at bugs.chromium.org. This vulnerability is traded as CVE-2017-6956 since 03/17/2017. The exploitability is told to be easy. The attack can only be done within the local network. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.6

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/17/2017 🔍
04/02/2017 +16 days 🔍
04/05/2017 +3 days 🔍
04/05/2017 +0 days 🔍
04/06/2017 +1 days 🔍
08/26/2020 +1238 days 🔍

Sourcesinfo

Advisory: bugs.chromium.org
Status: Not defined

CVE: CVE-2017-6956 (🔍)
GCVE (CVE): GCVE-0-2017-6956
GCVE (VulDB): GCVE-100-99324
OSVDB: - CVE-2017-6956 - Broadcom - Wi-Fi HardMAC SoC - Buffer Overflow Issue

Entryinfo

Created: 04/06/2017 10:44
Updated: 08/26/2020 07:24
Changes: 04/06/2017 10:44 (55), 08/26/2020 07:24 (2)
Complete: 🔍
Cache ID: 216:80F:103

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