MatrixSSL up to 4.2.1 ECDSA Signature crypto/pubkey/ecc_math.c risky encryption

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability was found in MatrixSSL up to 4.2.1 and classified as problematic. This impacts an unknown function of the file crypto/pubkey/ecc_math.c of the component ECDSA Signature Handler. Executing a manipulation can lead to risky encryption. This vulnerability appears as CVE-2019-13629. The attack requires local access. There is no available exploit.

Detailsinfo

A vulnerability has been found in MatrixSSL up to 4.2.1 and classified as problematic. This vulnerability affects an unknown code of the file crypto/pubkey/ecc_math.c of the component ECDSA Signature Handler. The manipulation with an unknown input leads to a risky encryption vulnerability. The CWE definition for the vulnerability is CWE-327. The product uses a broken or risky cryptographic algorithm or protocol. As an impact it is known to affect confidentiality. CVE summarizes:

MatrixSSL 4.2.1 and earlier contains a timing side channel in ECDSA signature generation. This allows a local or a remote attacker, able to measure the duration of hundreds to thousands of signing operations, to compute the private key used. The issue occurs because crypto/pubkey/ecc_math.c scalar multiplication leaks the bit length of the scalar.

The weakness was presented 10/03/2019 (oss-sec). The advisory is shared for download at openwall.com. This vulnerability was named CVE-2019-13629 since 07/17/2019. The exploitation appears to be difficult. The attack needs to be approached locally. A single authentication is needed for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1600.

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

See VDB-138988, VDB-142887 and VDB-142889 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.2
VulDB Meta Temp Score: 4.2

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

NVD Base Score: 5.9
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: Risky encryption
CWE: CWE-327 / CWE-310
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/17/2019 🔍
10/03/2019 +78 days 🔍
10/03/2019 +0 days 🔍
09/20/2020 +353 days 🔍

Sourcesinfo

Advisory: openwall.com
Status: Not defined

CVE: CVE-2019-13629 (🔍)
GCVE (CVE): GCVE-0-2019-13629
GCVE (VulDB): GCVE-100-142888
See also: 🔍

Entryinfo

Created: 10/03/2019 19:53
Updated: 09/20/2020 18:53
Changes: 10/03/2019 19:53 (39), 09/20/2020 18:53 (17)
Complete: 🔍
Cache ID: 216::103

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