CVE-2015-3644
published 2015-05-14CVE-2015-3644: 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…
PriorityP336medium5.8CVSS 2.0
AVNACMAuNCPIPAN
EPSS
2.14%
79.7th percentile
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
15 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | stunnel4 | < stunnel4 3:5.18-1 (bookworm) | stunnel4 3:5.18-1 (bookworm) |
| stunnel | stunnel | — | — |
| stunnel | stunnel | — | — |
| stunnel | stunnel | — | — |
| stunnel | stunnel | — | — |
| stunnel | stunnel | — | — |
| stunnel | stunnel | — | — |
| stunnel | stunnel | — | — |
| stunnel | stunnel | — | — |
| stunnel | stunnel | — | — |
| stunnel | stunnel | — | — |
| stunnel | stunnel | — | — |
| stunnel | stunnel | — | — |
| stunnel | stunnel | — | — |
| stunnel | stunnel | — | — |
CVSS provenance
nvdv2.05.8MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:N
osv5.8MEDIUM
vendor_debian5.8MEDIUM
vendor_redhat5.8MEDIUM
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GHSA
GHSA-3w38-w685-6793: Stunnel 5
ghsa_unreviewed·2022-05-17
CVE-2015-3644 [MEDIUM] CWE-284 GHSA-3w38-w685-6793: Stunnel 5
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.
OSV
CVE-2015-3644: Stunnel 5
osv·2015-05-14·CVSS 5.8
CVE-2015-3644 [MEDIUM] CVE-2015-3644: Stunnel 5
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.
Red Hat
stunnel: authentication bypass with the "redirect" option
vendor_redhat·2015-05-14·CVSS 5.8
CVE-2015-3644 [MEDIUM] stunnel: authentication bypass with the "redirect" option
stunnel: authentication bypass with the "redirect" option
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.
Package: stunnel (Red Hat Enterprise Linux 5) - Not affected
Package: stunnel (Red Hat Enterprise Linux 6) - Not affected
Package: stunnel (Red Hat Enterprise Linux 7) - Not affected
Debian
CVE-2015-3644: stunnel4 - Stunnel 5.00 through 5.13, when using the redirect option, does not redirect cli...
vendor_debian·2015·CVSS 5.8
CVE-2015-3644 [MEDIUM] CVE-2015-3644: stunnel4 - Stunnel 5.00 through 5.13, when using the redirect option, does not redirect cli...
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.
Scope: local
bookworm: resolved (fixed in 3:5.18-1)
bullseye: resolved (fixed in 3:5.18-1)
forky: resolved (fixed in 3:5.18-1)
sid: resolved (fixed in 3:5.18-1)
trixie: resolved (fixed in 3:5.18-1)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2015-3644 stunnel: authentication bypass with the "redirect" option [fedora-all]
bugzilla·2015-05-14·CVSS 5.8
CVE-2015-3644 [MEDIUM] CVE-2015-3644 stunnel: authentication bypass with the "redirect" option [fedora-all]
CVE-2015-3644 stunnel: authentication bypass with the "redirect" option [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported versi
Bugzilla
CVE-2015-3644 stunnel: authentication bypass with the "redirect" option
bugzilla·2015-05-14·CVSS 5.8
CVE-2015-3644 [MEDIUM] CVE-2015-3644 stunnel: authentication bypass with the "redirect" option
CVE-2015-3644 stunnel: authentication bypass with the "redirect" option
The following flaw was found in stunnel:
Normally, clients are connected to the host(s) specified with the "connect" option on authentication success, and rejected on authentication failure (untrusted client certificate). When the "redirect" option is specified, such connections are supposed to be forwarded to the host(s) specified with "redirect" rather then rejected.
In Stunnel versions 5.00 to 5.13, only the initial connection is redirected to the host(s) specified with "redirect". The subsequent connections established with reused SSL/TLS sessions are always forwarded to the host(s) specified with "connect" as if they were successfully authenticated.
The vulnerability is exploitable under the following conditio
http://www.debian.org/security/2015/dsa-3299http://www.securityfocus.com/bid/74659http://www.securitytracker.com/id/1032324https://www.stunnel.org/CVE-2015-3644.htmlhttp://www.debian.org/security/2015/dsa-3299http://www.securityfocus.com/bid/74659http://www.securitytracker.com/id/1032324https://www.stunnel.org/CVE-2015-3644.html
2015-05-14
Published