CyaSSL Leaf Certificate SSL/TLS Handshake cryptographic issue

CVSS Meta Temp Score
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Current Exploit Price (≈)
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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.
5.3$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in CyaSSL. Affected by this vulnerability is an unknown functionality of the component Leaf Certificate Handler. Performing a manipulation as part of SSL/TLS Handshake results in cryptographic issue. This vulnerability is reported as CVE-2014-2903. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in CyaSSL (version now known). It has been classified as critical. This affects some unknown processing of the component Leaf Certificate Handler. The manipulation as part of a SSL/TLS Handshake leads to a cryptographic issue vulnerability. CWE is classifying the issue as CWE-310. This is going to have an impact on confidentiality, and integrity. The summary by CVE is:

CyaSSL does not check the key usage extension in leaf certificates, which allows remote attackers to spoof servers via a crafted server certificate not authorized for use in an SSL/TLS handshake.

The bug was discovered 04/18/2017. The weakness was disclosed 10/06/2017 (oss-sec). It is possible to read the advisory at openwall.com. This vulnerability is uniquely identified as CVE-2014-2903 since 04/18/2014. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1600 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 171 days. During that time the estimated underground price was around $0-$5k.

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

The vulnerability is also documented in the vulnerability database at Secunia (SA62604†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.8
VulDB Temp Score: 4.8
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: Cryptographic issue
CWE: CWE-310
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
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

04/18/2014 🔍
04/18/2017 +1096 days 🔍
10/06/2017 +171 days 🔍
10/06/2017 +0 days 🔍
10/07/2017 +1 days 🔍
11/22/2019 +776 days 🔍

Sourcesinfo

Advisory: openwall.com
Status: Not defined

CVE: CVE-2014-2903 (🔍)
GCVE (CVE): GCVE-0-2014-2903
GCVE (VulDB): GCVE-100-107547
Secunia: 62604

Entryinfo

Created: 10/07/2017 12:13
Updated: 11/22/2019 15:47
Changes: 10/07/2017 12:13 (56), 11/22/2019 15:47 (1)
Complete: 🔍
Cache ID: 216:DE9:103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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