VDB-147708 · CVE-2019-19963 · GCVE-0-2019-19963

wolfSSL up to 4.2.x DAS covert channel

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.
4.4	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in wolfSSL up to 4.2.x. Affected by this vulnerability is an unknown functionality of the component DAS Handler. The manipulation results in covert channel. This vulnerability was named CVE-2019-19963. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in wolfSSL up to 4.2.x. Affected is an unknown functionality of the component DAS Handler. The manipulation with an unknown input leads to a covert channel vulnerability. CWE is classifying the issue as CWE-514. A covert channel is a path that can be used to transfer information in a way not intended by the system's designers. This is going to have an impact on confidentiality. CVE summarizes:

An issue was discovered in wolfSSL before 4.3.0 in a non-default configuration where DSA is enabled. DSA signing uses the BEEA algorithm during modular inversion of the nonce, leading to a side-channel attack against the nonce.

The weakness was presented 12/25/2019. This vulnerability is traded as CVE-2019-19963 since 12/24/2019. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

Upgrading to version 4.3.0 eliminates this vulnerability.

See VDB-147706 and VDB-147707 for similar entries. Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

wolfSSL

Version

License

open-source

Website

Product: https://github.com/wolfSSL/wolfssl/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.5
VulDB Meta Temp Score: 4.4

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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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: Covert channel
CWE: CWE-514
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 4.3.0
Patch: github.com

Timelineinfo

12/24/2019 🔍
12/25/2019 +1 days 🔍
12/25/2019 +0 days 🔍
03/17/2024 +1544 days 🔍

Sourcesinfo

Product: github.com

Advisory: 7e391f0fd57f2ef375b1174d752a56ce34b2b190
Status: Not defined

CVE: CVE-2019-19963 (🔍)
GCVE (CVE): GCVE-0-2019-19963
GCVE (VulDB): GCVE-100-147708
See also: 🔍

Entryinfo

Created: 12/25/2019 10:03
Updated: 03/17/2024 07:16
Changes: 12/25/2019 10:03 (38), 12/25/2019 10:08 (17), 03/17/2024 07:16 (7)
Complete: 🔍
Cache ID: 216::103