VDB-160214 · CVE-2020-24613 · GCVE-0-2020-24613

wolfSSL up to 4.4.x TLS 1.3 tls13.c SanityCheckTls13MsgReceived WAIT_CERT_CR certificate validation

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.9	$0-$5k	0.00

Summaryinfo

A vulnerability described as critical has been identified in wolfSSL up to 4.4.x. Affected is the function SanityCheckTls13MsgReceived of the file tls13.c of the component TLS 1.3 Handler. Such manipulation of the argument WAIT_CERT_CR leads to certificate validation. This vulnerability is traded as CVE-2020-24613. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in wolfSSL up to 4.4.x and classified as critical. Affected by this issue is the function SanityCheckTls13MsgReceived of the file tls13.c of the component TLS 1.3 Handler. The manipulation of the argument WAIT_CERT_CR with an unknown input leads to a certificate validation vulnerability. Using CWE to declare the problem leads to CWE-295. The product does not validate, or incorrectly validates, a certificate. Impacted is confidentiality, integrity, and availability. CVE summarizes:

wolfSSL before 4.5.0 mishandles TLS 1.3 server data in the WAIT_CERT_CR state, within SanityCheckTls13MsgReceived() in tls13.c. This is an incorrect implementation of the TLS 1.3 client state machine. This allows attackers in a privileged network position to completely impersonate any TLS 1.3 servers, and read or modify potentially sensitive information between clients using the wolfSSL library and these TLS servers.

The weakness was shared 08/24/2020. This vulnerability is handled as CVE-2020-24613 since 08/24/2020. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1587.003 by the MITRE ATT&CK project.

Upgrading to version 4.5.0 eliminates this vulnerability.

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Productinfo

Name

wolfSSL

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.1

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Certificate validation
CWE: CWE-295 / CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: wolfSSL 4.5.0

Timelineinfo

08/24/2020 🔍
08/24/2020 +0 days 🔍
08/25/2020 +1 days 🔍
08/25/2020 +0 days 🔍

Sourcesinfo

Status: Not defined

CVE: CVE-2020-24613 (🔍)
GCVE (CVE): GCVE-0-2020-24613
GCVE (VulDB): GCVE-100-160214

Entryinfo

Created: 08/25/2020 06:47
Updated: 08/25/2020 06:52
Changes: 08/25/2020 06:47 (40), 08/25/2020 06:52 (17)
Complete: 🔍
Cache ID: 216::103