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CVE-2014-0016

19
FAUCET Score

CVE-2014-0016 describes a vulnerability in stunnel versions prior to 5.00 when configured for fork threading. This flaw prevents proper updating of the OpenSSL pseudo-random number generator (PRNG) state, leading to subsequent child processes reusing the same entropy pool. This medium-complexity vulnerability (CVSS 4.3) allows remote attackers to potentially compromise private keys for EC (ECDSA) or DSA certificates, resulting in a partial confidentiality impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.56CPE matchmatch criteria
cpe:2.3:a:stunnel:stunnel:*:*:*:*:*:*:*:*
0.1CPE matchmatch criteria
cpe:2.3:a:stunnel:stunnel:0.1:*:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:stunnel:stunnel:1.0:*:*:*:*:*:*:*
1.1CPE matchmatch criteria
cpe:2.3:a:stunnel:stunnel:1.1:*:*:*:*:*:*:*
1.2CPE matchmatch criteria
cpe:2.3:a:stunnel:stunnel:1.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.15%
Probability of exploitation in next 30 days
EPSS Percentile
80.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0215 is in the 68th percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2014-0016Moderate

stunnel: Improper initialization of PRNG after fork()

Mar 5, 2014

References

bugzilla.redhat.com / attachment.cgi
Patch
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party AdvisoryVDB Entry
stunnel.org / sdf_ChangeLog.html
Release NotesVendor Advisory
openwall.com / lists/oss-security/2014/03/05/1
Mailing ListThird Party Advisory
securityfocus.com / bid/65964
Third Party AdvisoryVDB Entry