What’s Vulnerable › Vulnerabilities

CVE-2014-0016

• Severity: medium (CVSS 4.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2014-03-24 · updated 2026-06-17
• Weakness: CWE-332

Description

stunnel before 5.00, when using fork threading, does not properly update the state of the OpenSSL pseudo-random number generator (PRNG), which causes subsequent children with the same process ID to use the same entropy pool and allows remote attackers to obtain private keys for EC (ECDSA) or DSA certificates.

Affected products

• stunnel: through 4.56; 0.1, 1.0, 1.1, 1.2, 1.3, 1.4 (+106)

References

• http://www.openwall.com/lists/oss-security/2014/03/05/1
• http://www.securityfocus.com/bid/65964
• https://bugzilla.redhat.com/attachment.cgi?id=870826&action=diff
• https://bugzilla.redhat.com/show_bug.cgi?id=1072180
• https://www.stunnel.org/sdf_ChangeLog.html
• http://www.openwall.com/lists/oss-security/2014/03/05/1
• http://www.securityfocus.com/bid/65964
• https://bugzilla.redhat.com/attachment.cgi?id=870826&action=diff
• https://bugzilla.redhat.com/show_bug.cgi?id=1072180
• https://www.stunnel.org/sdf_ChangeLog.html

Get alerted when CVE-2014-0016 or the next vulnerability affects your stack