hostapd/wpa_supplicant up to 2.5 WPS Operation passphrase input validation

CVSS Meta Temp Score
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CTI Interest Score
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7.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in hostapd and wpa_supplicant up to 2.5. This issue affects some unknown processing of the component WPS Operation Handler. Executing a manipulation of the argument passphrase with the input \n\r can lead to input validation. The identification of this vulnerability is CVE-2016-4476. The attack can only be executed locally. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in hostapd and wpa_supplicant up to 2.5 and classified as critical. This vulnerability affects some unknown functionality of the component WPS Operation Handler. The manipulation of the argument passphrase with the input value \n\r leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

hostapd 0.6.7 through 2.5 and wpa_supplicant 0.6.7 through 2.5 do not reject \n and \r characters in passphrase parameters, which allows remote attackers to cause a denial of service (daemon outage) via a crafted WPS operation.

The weakness was shared 05/09/2016 (Website). The advisory is shared for download at openwall.com. This vulnerability was named CVE-2016-4476 since 05/03/2016. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 91135 (Debian DLA-473-1 : wpa security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 170540 (OpenSUSE Security Update for hostapd (openSUSE-SU-2017:2896-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 5 days after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (91135). The entries VDB-75143, VDB-75887, VDB-75890 and VDB-75891 are related to this item. Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.5

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 91135
Nessus Name: Debian DLA-473-1 : wpa security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 850584
OpenVAS Name: SuSE Update for hostapd openSUSE-SU-2017:2896-1 (hostapd)
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: 🔍

Timelineinfo

05/03/2016 🔍
05/09/2016 +6 days 🔍
05/09/2016 +0 days 🔍
05/10/2016 +1 days 🔍
05/14/2016 +4 days 🔍
05/16/2016 +2 days 🔍
08/17/2022 +2284 days 🔍

Sourcesinfo

Advisory: USN-3455-1
Status: Not defined

CVE: CVE-2016-4476 (🔍)
GCVE (CVE): GCVE-0-2016-4476
GCVE (VulDB): GCVE-100-87124
See also: 🔍

Entryinfo

Created: 05/10/2016 10:30
Updated: 08/17/2022 22:45
Changes: 05/10/2016 10:30 (63), 11/23/2018 10:45 (11), 08/17/2022 22:45 (4)
Complete: 🔍
Cache ID: 216:5DF:103

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