CVE-2015-3644
stunnel: authentication bypass with the "redirect" option
Severity
ImportantRed Hat Product Security
CVSS 2.0
Review impact separately from score.
Published · May 14, 2015
Updated · November 21, 2025
Description
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.
Statement
Not vulnerable. This issue did not affect the versions of stunnel as shipped with Red Hat Enterprise Linux 5, 6, and 7.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 2.0 · 6.4AV:N/AC:L/Au:N/C:P/I:P/A:N
CWE not specified