WPA2 Tunneled Direct-Link Setup KRACK nonce re-use

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability was found in WPA2. It has been classified as critical. Affected by this issue is some unknown functionality of the component Tunneled Direct-Link Setup Handler. Performing a manipulation results in nonce re-use (KRACK). This vulnerability is cataloged as CVE-2017-13086. The attack may be carried out on the physical device. There is no exploit available. This vulnerability has a historic impact because of its background and how it was received. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in WPA2 (unknown version). It has been classified as critical. This affects an unknown code block of the component Tunneled Direct-Link Setup Handler. The manipulation with an unknown input leads to a nonce re-use vulnerability (KRACK). CWE is classifying the issue as CWE-323. Nonces should be used for the present occasion and only once. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Wi-Fi Protected Access (WPA and WPA2) allows reinstallation of the Tunneled Direct-Link Setup (TDLS) Peer Key (TPK) during the TDLS handshake, allowing an attacker within radio range to replay, decrypt, or spoof frames.

The bug was discovered 10/16/2017. The weakness was shared 10/16/2017 by Mathy Vanhoef as confirmed paper (Website). The advisory is shared at papers.mathyvanhoef.com. The public release happened without involvement of the project team. The paper contains:

Our research paper behind the attack is titled Key Reinstallation Attacks: Forcing Nonce Reuse in WPA2 and will be presented at the Computer and Communications Security (CCS) conference on Wednesday 1 November 2017.
This vulnerability is uniquely identified as CVE-2017-13086 since 08/22/2017. An attack has to be approached locally. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/03/2023). MITRE ATT&CK project uses the attack technique T1600.001 for this issue. Due to its background and reception, this vulnerability has a historic impact. The advisory points out:
We discovered serious weaknesses in WPA2, a protocol that secures all modern protected Wi-Fi networks. An attacker within range of a victim can exploit these weaknesses using key reinstallation attacks (KRACKs). Concretely, attackers can use this novel attack technique to read information that was previously assumed to be safely encrypted. This can be abused to steal sensitive information such as credit card numbers, passwords, chat messages, emails, photos, and so on. The attack works against all modern protected Wi-Fi networks. Depending on the network configuration, it is also possible to inject and manipulate data. For example, an attacker might be able to inject ransomware or other malware into websites.

We expect the 0-day to have been worth approximately $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 103881 (CentOS 7 : wpa_supplicant (CESA-2017:2907) (KRACK)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176179 (Debian Security Update for wpa (DSA 3999-1) (KRACK Attack)). The advisory illustrates:

As a proof-of-concept we executed a key reinstallation attack against an Android smartphone. In this demonstration, the attacker is able to decrypt all data that the victim transmits. For an attacker this is easy to accomplish, because our key reinstallation attack is exceptionally devastating against Linux and Android 6.0 or higher.

Upgrading eliminates this vulnerability. A possible mitigation has been published 1 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (103881) and SecurityFocus (BID 101274†). Further details are available at krackattacks.com. The entries VDB-107882, VDB-107883, VDB-107884 and VDB-107885 are related to this item. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

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CVSSv4info

VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.8
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CVSSv2info

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Exploitinginfo

Name: KRACK
Class: Nonce re-use / KRACK
CWE: CWE-323
CAPEC: 🔍
ATT&CK: 🔍

Physical: Yes
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 103881
Nessus Name: CentOS 7 : wpa_supplicant (CESA-2017:2907) (KRACK)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 53378
OpenVAS Name: Debian Security Advisory DSA 3999-1 (wpa - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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Timelineinfo

08/22/2017 🔍
10/16/2017 +55 days 🔍
10/16/2017 +0 days 🔍
10/16/2017 +0 days 🔍
10/16/2017 +0 days 🔍
10/17/2017 +1 days 🔍
10/17/2017 +0 days 🔍
10/18/2017 +1 days 🔍
01/03/2023 +1903 days 🔍

Sourcesinfo

Advisory: RHSA-2017:2907
Researcher: Mathy Vanhoef
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-13086 (🔍)
GCVE (CVE): GCVE-0-2017-13086
GCVE (VulDB): GCVE-100-107889

OVAL: 🔍

CERT: 🔍
SecurityFocus: 101274 - WPA2 Key Reinstallation Multiple Security Weaknesses
SecurityTracker: 1039573

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 10/16/2017 18:10
Updated: 01/03/2023 16:40
Changes: 10/16/2017 18:10 (84), 11/25/2019 15:18 (7), 01/17/2021 08:22 (3), 01/03/2023 16:40 (3)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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