CVE-2015-7744

Wolfssl vulnerability

CVSS

5.9

EPSS

5.0%

EPSS pct

91th

Exploited

No known

wolfSSL (formerly CyaSSL) before 3.6.8 does not properly handle faults associated with the Chinese Remainder Theorem (CRT) process when allowing ephemeral key exchange without low memory optimizations on a server, which makes it easier for remote attackers to obtain private RSA keys by capturing TLS handshakes, aka a Lenstra attack.

Affected vendor

Wolfssl

Affected product

Wolfssl

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Published

2016-01-22

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, high attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality.

Its EPSS score of 5.0% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 91% of all scored CVEs.

Check your external exposure to CVE-2015-7744

Confirm whether Wolfssl Wolfssl is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2015-7744.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2015-7744

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2015-7744 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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