Arm Mbed Crypto/mbed TLS up to 2.1 ECDSA ecdsa.c information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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3.6$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Arm Mbed Crypto and mbed TLS up to 2.1. Affected is an unknown function of the file ecdsa.c of the component ECDSA Handler. The manipulation results in information disclosure. This vulnerability is known as CVE-2019-18222. Attacking locally is a requirement. No exploit is available.

Detailsinfo

A vulnerability was found in Arm Mbed Crypto and mbed TLS up to 2.1. It has been classified as problematic. Affected is an unknown code block of the file ecdsa.c of the component ECDSA Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. CVE summarizes:

The ECDSA signature implementation in ecdsa.c in Arm Mbed Crypto 2.1 and Mbed TLS through 2.19.1 does not reduce the blinded scalar before computing the inverse, which allows a local attacker to recover the private key via side-channel attacks.

The weakness was published 01/23/2020 (Website). The advisory is shared for download at tls.mbed.org. This vulnerability is traded as CVE-2019-18222 since 10/21/2019. The exploitability is told to be difficult. The attack needs to be approached locally. The requirement for exploitation is a authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

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

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Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.6
VulDB Meta Temp Score: 3.6

VulDB Base Score: 2.5
VulDB Temp Score: 2.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.7
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: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

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

10/21/2019 🔍
01/23/2020 +94 days 🔍
01/24/2020 +1 days 🔍
03/25/2024 +1522 days 🔍

Sourcesinfo

Advisory: DLA 3249-1
Status: Not defined

CVE: CVE-2019-18222 (🔍)
GCVE (CVE): GCVE-0-2019-18222
GCVE (VulDB): GCVE-100-149280

Entryinfo

Created: 01/24/2020 08:37
Updated: 03/25/2024 14:56
Changes: 01/24/2020 08:37 (38), 01/24/2020 08:42 (17), 03/25/2024 14:56 (17)
Complete: 🔍
Cache ID: 216::103

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