Vulnerability record · CVE-2014-0016 · published 24 March 2014

CVE-2014-0016: Stunnel vulnerability

Stunnel · Stunnel

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.

4.3 CVSS 2.0 Medium EPSS 2.2% · top 18.2% CWE-332 · CWE-332

4.3CVSS 2.0 base score

2.2%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

10References

17 Jun 2026Last modified by NVD

Description

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Stunnel Stunnel

References

Link	Tags
http://www.openwall.com/lists/oss-security/2014/03/05/1	Mailing ListThird Party Advisory
http://www.securityfocus.com/bid/65964	Third Party AdvisoryVDB Entry
https://bugzilla.redhat.com/attachment.cgi?id=870826&action=diff	Patch
https://bugzilla.redhat.com/show_bug.cgi?id=1072180	Issue TrackingThird Party AdvisoryVDB Entry
https://www.stunnel.org/sdf_ChangeLog.html	Release NotesVendor Advisory
http://www.openwall.com/lists/oss-security/2014/03/05/1	Mailing ListThird Party Advisory
http://www.securityfocus.com/bid/65964	Third Party AdvisoryVDB Entry
https://bugzilla.redhat.com/attachment.cgi?id=870826&action=diff	Patch
https://bugzilla.redhat.com/show_bug.cgi?id=1072180	Issue TrackingThird Party AdvisoryVDB Entry
https://www.stunnel.org/sdf_ChangeLog.html	Release NotesVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2001-0060Stunnel vulnerabilityFormat string vulnerability in stunnel 3.8 and earlier allows attackers to execute arbitrary commands via a malformed ident username.EPSS 2.8%12 Feb 2001 9.3CVE-2011-2940Stunnel memory buffer overflow vulnerabilitystunnel 4.40 and 4.41 might allow remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified ve…EPSS 5.7%25 Aug 2011 7.5CVE-2021-20230Stunnel improper certificate validation vulnerabilityA flaw was found in stunnel before 5.57, where it improperly validates client certificates when it is configured to use both redirect and verifyChain…EPSS 1.2%23 Feb 2021 7.5CVE-2002-0002Stunnel vulnerabilityFormat string vulnerability in stunnel before 3.22 when used in client mode for (1) smtp, (2) pop, or (3) nntp allows remote malicious servers to exe…EPSS 5.3%31 Jan 2002 7.2CVE-2008-2400Stunnel permissions and access controls vulnerabilityUnspecified vulnerability in stunnel before 4.23, when running as a service on Windows, allows local users to gain privileges via unknown attack vect…EPSS 0.35%22 May 2008 6.8CVE-2008-2420Stunnel permissions and access controls vulnerabilityThe OCSP functionality in stunnel before 4.24 does not properly search certificate revocation lists (CRL), which allows remote attackers to bypass in…EPSS 1.4%23 May 2008 6.6CVE-2013-1762Stunnel code injection vulnerabilitystunnel 4.21 through 4.54, when CONNECT protocol negotiation and NTLM authentication are enabled, does not correctly perform integer conversion, whic…EPSS 2.9%8 Mar 2013 5.8CVE-2015-3644Stunnel improper access control vulnerabilityStunnel 5.00 through 5.13, when using the redirect option, does not redirect client connections to the expected server after the initial connection, …EPSS 2.1%14 May 2015

Source: NIST National Vulnerability Database (record CVE-2014-0016), CISA KEV, FIRST EPSS (scores of 2026-10-16). This page is refreshed as NVD updates the record.