Stunnel
CVE-2015-3644
MEDIUM
Severity by source
AV:N/AC:M/Au:N/C:P/I:P/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
AV:N/AC:M/Au:N/C:P/I:P/A:N
Lifecycle Timeline
1DescriptionCVE.org
Stunnel 5.00 through 5.13, when using the redirect option, does not redirect client connections to the expected server after the initial connection, which allows remote attackers to bypass authentication.
AnalysisAI
Stunnel 5.00 through 5.13, when using the redirect option, does not redirect client connections to the expected server after the initial connection, which allows remote attackers to bypass. Rated medium severity (CVSS 5.8), this vulnerability is remotely exploitable.
Technical ContextAI
This vulnerability is classified under CWE-284. Stunnel 5.00 through 5.13, when using the redirect option, does not redirect client connections to the expected server after the initial connection, which allows remote attackers to bypass authentication. Affected products include: Stunnel. Version information: through 5.13.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
A flaw was found in stunnel before 5.57, where it improperly validates client certificates when it is configured to use
stunnel 4.21 through 4.54, when CONNECT protocol negotiation and NTLM authentication are enabled, does not correctly per
stunnel before 5.00, when using fork threading, does not properly update the state of the OpenSSL pseudo-random number g
Same weakness CWE-284 – Improper Access Control
View allSame technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today