Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2014-0016

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.

Security Impact Summary

CVE-2014-0016 is a security vulnerability that . Impacting 1 product from stunnel organizations running these solutions should prioritize assessment and patching.

Historical Context

Documented in 2014, this vulnerability occurred amid the cloud computing expansion era, where traditional network perimeter security models were being reevaluated. Organizations were transitioning from isolated infrastructure to interconnected systems, creating new attack surfaces that vulnerabilities like this could exploit.

Published

2014-03-24T16:31:08.447

Last Modified

2025-04-12T10:46:40.837

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 4.3 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:P/I:N/A:N

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Primary
CWE-332

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	stunnel	stunnel	≤ 4.56	Yes
Application	stunnel	stunnel	0.1	Yes
Application	stunnel	stunnel	1.0	Yes
Application	stunnel	stunnel	1.1	Yes
Application	stunnel	stunnel	1.2	Yes
Application	stunnel	stunnel	1.3	Yes
Application	stunnel	stunnel	1.4	Yes
Application	stunnel	stunnel	1.5	Yes
Application	stunnel	stunnel	1.6	Yes
Application	stunnel	stunnel	2.0	Yes
Application	stunnel	stunnel	2.1	Yes
Application	stunnel	stunnel	3.0	Yes
Application	stunnel	stunnel	3.0	Yes
Application	stunnel	stunnel	3.0	Yes
Application	stunnel	stunnel	3.0	Yes
Application	stunnel	stunnel	3.0	Yes
Application	stunnel	stunnel	3.0	Yes
Application	stunnel	stunnel	3.0	Yes
Application	stunnel	stunnel	3.0	Yes
Application	stunnel	stunnel	3.1	Yes
Application	stunnel	stunnel	3.2	Yes
Application	stunnel	stunnel	3.3	Yes
Application	stunnel	stunnel	3.4a	Yes
Application	stunnel	stunnel	3.5	Yes
Application	stunnel	stunnel	3.6	Yes
Application	stunnel	stunnel	3.7	Yes
Application	stunnel	stunnel	3.8	Yes
Application	stunnel	stunnel	3.8	Yes
Application	stunnel	stunnel	3.8	Yes
Application	stunnel	stunnel	3.8	Yes
Application	stunnel	stunnel	3.8	Yes
Application	stunnel	stunnel	3.8p1	Yes
Application	stunnel	stunnel	3.8p2	Yes
Application	stunnel	stunnel	3.8p3	Yes
Application	stunnel	stunnel	3.8p4	Yes
Application	stunnel	stunnel	3.9	Yes
Application	stunnel	stunnel	3.10	Yes
Application	stunnel	stunnel	3.11	Yes
Application	stunnel	stunnel	3.12	Yes
Application	stunnel	stunnel	3.13	Yes
Application	stunnel	stunnel	3.14	Yes
Application	stunnel	stunnel	3.15	Yes
Application	stunnel	stunnel	3.16	Yes
Application	stunnel	stunnel	3.17	Yes
Application	stunnel	stunnel	3.18	Yes
Application	stunnel	stunnel	3.19	Yes
Application	stunnel	stunnel	3.20	Yes
Application	stunnel	stunnel	3.21	Yes
Application	stunnel	stunnel	3.21a	Yes
Application	stunnel	stunnel	3.21b	Yes
Application	stunnel	stunnel	3.21c	Yes
Application	stunnel	stunnel	3.22	Yes
Application	stunnel	stunnel	3.23	Yes
Application	stunnel	stunnel	3.24	Yes
Application	stunnel	stunnel	3.25	Yes
Application	stunnel	stunnel	3.26	Yes
Application	stunnel	stunnel	4.00	Yes
Application	stunnel	stunnel	4.0	Yes
Application	stunnel	stunnel	4.01	Yes
Application	stunnel	stunnel	4.02	Yes
Application	stunnel	stunnel	4.03	Yes
Application	stunnel	stunnel	4.04	Yes
Application	stunnel	stunnel	4.05	Yes
Application	stunnel	stunnel	4.06	Yes
Application	stunnel	stunnel	4.07	Yes
Application	stunnel	stunnel	4.08	Yes
Application	stunnel	stunnel	4.09	Yes
Application	stunnel	stunnel	4.10	Yes
Application	stunnel	stunnel	4.11	Yes
Application	stunnel	stunnel	4.12	Yes
Application	stunnel	stunnel	4.13	Yes
Application	stunnel	stunnel	4.14	Yes
Application	stunnel	stunnel	4.15	Yes
Application	stunnel	stunnel	4.16	Yes
Application	stunnel	stunnel	4.17	Yes
Application	stunnel	stunnel	4.18	Yes
Application	stunnel	stunnel	4.19	Yes
Application	stunnel	stunnel	4.20	Yes
Application	stunnel	stunnel	4.21	Yes
Application	stunnel	stunnel	4.22	Yes
Application	stunnel	stunnel	4.23	Yes
Application	stunnel	stunnel	4.24	Yes
Application	stunnel	stunnel	4.25	Yes
Application	stunnel	stunnel	4.26	Yes
Application	stunnel	stunnel	4.27	Yes
Application	stunnel	stunnel	4.28	Yes
Application	stunnel	stunnel	4.29	Yes
Application	stunnel	stunnel	4.30	Yes
Application	stunnel	stunnel	4.31	Yes
Application	stunnel	stunnel	4.32	Yes
Application	stunnel	stunnel	4.33	Yes
Application	stunnel	stunnel	4.34	Yes
Application	stunnel	stunnel	4.35	Yes
Application	stunnel	stunnel	4.36	Yes
Application	stunnel	stunnel	4.37	Yes
Application	stunnel	stunnel	4.38	Yes
Application	stunnel	stunnel	4.39	Yes
Application	stunnel	stunnel	4.40	Yes
Application	stunnel	stunnel	4.41	Yes
Application	stunnel	stunnel	4.42	Yes
Application	stunnel	stunnel	4.43	Yes
Application	stunnel	stunnel	4.44	Yes
Application	stunnel	stunnel	4.45	Yes
Application	stunnel	stunnel	4.46	Yes
Application	stunnel	stunnel	4.47	Yes
Application	stunnel	stunnel	4.48	Yes
Application	stunnel	stunnel	4.49	Yes
Application	stunnel	stunnel	4.50	Yes
Application	stunnel	stunnel	4.51	Yes
Application	stunnel	stunnel	4.52	Yes
Application	stunnel	stunnel	4.53	Yes
Application	stunnel	stunnel	4.54	Yes
Application	stunnel	stunnel	4.55	Yes

References

http://www.openwall.com/lists/oss-security/2014/03/05/1 Mailing List, Third Party Advisory ([email protected])
http://www.securityfocus.com/bid/65964 Third Party Advisory, VDB Entry ([email protected])
https://bugzilla.redhat.com/attachment.cgi?id=870826&action=diff Patch ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=1072180 Issue Tracking, Third Party Advisory, VDB Entry ([email protected])
https://www.stunnel.org/sdf_ChangeLog.html Release Notes, Vendor Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2014/03/05/1 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/65964 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/attachment.cgi?id=870826&action=diff Patch (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=1072180 Issue Tracking, Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://www.stunnel.org/sdf_ChangeLog.html Release Notes, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For stunnel's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.