Upstream information

CVE-2021-20230 at MITRE

Description

A flaw was found in stunnel before 5.57, where it improperly validates client certificates when it is configured to use both redirect and verifyChain options. This flaw allows an attacker with a certificate signed by a Certificate Authority, which is not the one accepted by the stunnel server, to access the tunneled service instead of being redirected to the address specified in the redirect option. The highest threat from this vulnerability is to confidentiality.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having important severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 5
Vector AV:N/AC:L/Au:N/C:P/I:N/A:N
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact None
Availability Impact None
CVSS v3 Scores
  National Vulnerability Database SUSE
Base Score 7.5 7.5
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network Network
Attack Complexity Low Low
Privileges Required None None
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact High High
Integrity Impact None None
Availability Impact None None
CVSSv3 Version 3.1 3.1
SUSE Bugzilla entries: 1177580 [RESOLVED / FIXED], 1182529 [RESOLVED / FIXED]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
SUSE CaaS Platform 4.0
  • stunnel >= 5.44-3.8.1
Patchnames:
SUSE-SUSE-CAASP-4.0-2021-1465
SUSE Enterprise Storage 6
  • stunnel >= 5.44-3.8.1
Patchnames:
SUSE-Storage-6-2021-1465
SUSE Enterprise Storage 7.1
SUSE Linux Enterprise High Performance Computing 15 SP3
SUSE Linux Enterprise Module for Server Applications 15 SP3
SUSE Linux Enterprise Server 15 SP3
SUSE Linux Enterprise Server for SAP Applications 15 SP3
SUSE Manager Proxy 4.2
SUSE Manager Retail Branch Server 4.2
SUSE Manager Server 4.2
  • stunnel >= 5.57-3.11.1
Patchnames:
SUSE Linux Enterprise Module for Server Applications 15 SP3 GA stunnel-5.57-3.11.1
SUSE Enterprise Storage 7
SUSE Linux Enterprise High Performance Computing 15 SP2
SUSE Linux Enterprise Module for Server Applications 15 SP2
SUSE Linux Enterprise Server 15 SP2
SUSE Linux Enterprise Server for SAP Applications 15 SP2
SUSE Manager Proxy 4.1
SUSE Manager Retail Branch Server 4.1
SUSE Manager Server 4.1
  • stunnel >= 5.57-3.11.1
Patchnames:
SUSE-SLE-Module-Server-Applications-15-SP2-2021-772
SUSE Liberty Linux 8
  • stunnel >= 5.56-5.el8_3
Patchnames:
RHSA-2021:0618
SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS
  • stunnel >= 5.44-3.8.1
Patchnames:
SUSE-SLE-Product-HPC-15-SP1-ESPOS-2021-1465
SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS
  • stunnel >= 5.44-3.8.1
Patchnames:
SUSE-SLE-Product-HPC-15-SP1-LTSS-2021-1465
SUSE Linux Enterprise High Performance Computing 15 SP4
SUSE Linux Enterprise Module for Server Applications 15 SP4
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server for SAP Applications 15 SP4
SUSE Manager Proxy 4.3
SUSE Manager Retail Branch Server 4.3
SUSE Manager Server 4.3
  • stunnel >= 5.57-3.11.1
Patchnames:
SUSE Linux Enterprise Module for Server Applications 15 SP4 GA stunnel-5.62-3.14.1
SUSE Linux Enterprise High Performance Computing 15 SP5
SUSE Linux Enterprise Module for Server Applications 15 SP5
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server for SAP Applications 15 SP5
  • stunnel >= 5.57-3.11.1
Patchnames:
SUSE Linux Enterprise Module for Server Applications 15 SP5 GA stunnel-5.62-3.14.1
SUSE Linux Enterprise High Performance Computing 15-ESPOS
SUSE Linux Enterprise High Performance Computing 15-LTSS
  • stunnel >= 5.44-3.8.1
Patchnames:
SUSE-SLE-Product-HPC-15-2021-1465
SUSE Linux Enterprise Server 15 SP1-BCL
  • stunnel >= 5.44-3.8.1
Patchnames:
SUSE-SLE-Product-SLES-15-SP1-BCL-2021-1465
SUSE Linux Enterprise Server 15 SP1-LTSS
  • stunnel >= 5.44-3.8.1
Patchnames:
SUSE-SLE-Product-SLES-15-SP1-LTSS-2021-1465
SUSE Linux Enterprise Server 15-LTSS
  • stunnel >= 5.44-3.8.1
Patchnames:
SUSE-SLE-Product-SLES-15-2021-1465
SUSE Linux Enterprise Server for SAP Applications 15 SP1
  • stunnel >= 5.44-3.8.1
Patchnames:
SUSE-SLE-Product-SLES_SAP-15-SP1-2021-1465
SUSE Linux Enterprise Server for SAP Applications 15
  • stunnel >= 5.44-3.8.1
Patchnames:
SUSE-SLE-Product-SLES_SAP-15-2021-1465
SUSE Manager Proxy 4.0
  • stunnel >= 5.44-3.8.1
Patchnames:
SUSE-SLE-Product-SUSE-Manager-Proxy-4.0-2021-1465
SUSE Manager Retail Branch Server 4.0
  • stunnel >= 5.44-3.8.1
Patchnames:
SUSE-SLE-Product-SUSE-Manager-Retail-Branch-Server-4.0-2021-1465
SUSE Manager Server 4.0
  • stunnel >= 5.44-3.8.1
Patchnames:
SUSE-SLE-Product-SUSE-Manager-Server-4.0-2021-1465
openSUSE Leap 15.2
  • stunnel >= 5.57-lp152.2.6.1
  • stunnel-doc >= 5.57-lp152.2.6.1
Patchnames:
openSUSE-2021-409


Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products under general support and receiving all security fixes.
SUSE Enterprise Storage 7.1 stunnel Released
SUSE Linux Enterprise High Performance Computing 12 SP5 stunnel Not affected
SUSE Linux Enterprise High Performance Computing 15 SP5 stunnel Released
SUSE Linux Enterprise Module for Server Applications 15 SP5 stunnel Released
SUSE Linux Enterprise Real Time 15 SP3 stunnel Affected
SUSE Linux Enterprise Server 12 SP5 stunnel Not affected
SUSE Linux Enterprise Server 12-LTSS stunnel Not affected
SUSE Linux Enterprise Server 15 SP5 stunnel Released
SUSE Linux Enterprise Server for SAP Applications 12 SP5 stunnel Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP4 stunnel Released
SUSE Linux Enterprise Server for SAP Applications 15 SP5 stunnel Released
SUSE Manager Proxy 4.3 stunnel Released
SUSE Manager Retail Branch Server 4.3 stunnel Released
SUSE Manager Server 4.3 stunnel Released
Products under Long Term Service Pack support and receiving important and critical security fixes.
SUSE Linux Enterprise High Performance Computing 15 stunnel Affected
SUSE Linux Enterprise High Performance Computing 15 SP1 stunnel Unsupported
SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS stunnel Released
SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS stunnel Released
SUSE Linux Enterprise High Performance Computing 15 SP2 stunnel Released
SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS stunnel Unsupported
SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS stunnel Affected
SUSE Linux Enterprise High Performance Computing 15 SP3 stunnel Released
SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS stunnel Affected
SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS stunnel Affected
SUSE Linux Enterprise High Performance Computing 15 SP4 stunnel Released
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS stunnel Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS stunnel Affected
SUSE Linux Enterprise High Performance Computing 15-ESPOS stunnel Released
SUSE Linux Enterprise High Performance Computing 15-LTSS stunnel Released
SUSE Linux Enterprise Module for Server Applications 15 SP2 stunnel Released
SUSE Linux Enterprise Module for Server Applications 15 SP3 stunnel Released
SUSE Linux Enterprise Module for Server Applications 15 SP4 stunnel Released
SUSE Linux Enterprise Server 15 SP2 stunnel Released
SUSE Linux Enterprise Server 15 SP2-LTSS stunnel Affected
SUSE Linux Enterprise Server 15 SP3 stunnel Released
SUSE Linux Enterprise Server 15 SP3-LTSS stunnel Affected
SUSE Linux Enterprise Server 15 SP4 stunnel Released
SUSE Linux Enterprise Server 15 SP4-LTSS stunnel Affected
SUSE Linux Enterprise Server 15-ESPOS stunnel Unsupported
SUSE Linux Enterprise Server Business Critical Linux 15 SP1 stunnel Unsupported
SUSE Linux Enterprise Server Business Critical Linux 15 SP2 stunnel Unsupported
SUSE Linux Enterprise Server for SAP Applications 15 stunnel Released
SUSE Linux Enterprise Server for SAP Applications 15 SP1 stunnel Released
SUSE Linux Enterprise Server for SAP Applications 15 SP2 stunnel Released
SUSE Linux Enterprise Server for SAP Applications 15 SP3 stunnel Released
SUSE OpenStack Cloud 8 stunnel Not affected
SUSE OpenStack Cloud 9 stunnel Not affected
Products past their end of life and not receiving proactive updates anymore.
HPE Helion OpenStack 8 stunnel Not affected
SUSE CaaS Platform 4.0 stunnel Released
SUSE Enterprise Storage 5 stunnel Unsupported
SUSE Enterprise Storage 6 stunnel Released
SUSE Enterprise Storage 7 stunnel Released
SUSE Linux Enterprise Module for Server Applications 15 stunnel Affected
SUSE Linux Enterprise Module for Server Applications 15 SP1 stunnel Unsupported
SUSE Linux Enterprise Point of Service 11 SP3 stunnel Not affected
SUSE Linux Enterprise Point of Service Image Server 12 SP2 stunnel Unsupported
SUSE Linux Enterprise Real Time 15 SP2 stunnel Unsupported
SUSE Linux Enterprise Real Time 15 SP4 stunnel Affected
SUSE Linux Enterprise Server 11 SP3 stunnel Not affected
SUSE Linux Enterprise Server 11 SP3-LTSS stunnel Not affected
SUSE Linux Enterprise Server 11 SP4 stunnel Not affected
SUSE Linux Enterprise Server 11 SP4 LTSS stunnel Not affected
SUSE Linux Enterprise Server 11 SP4-LTSS stunnel Not affected
SUSE Linux Enterprise Server 12 stunnel Not affected
SUSE Linux Enterprise Server 12 SP1 stunnel Not affected
SUSE Linux Enterprise Server 12 SP1-LTSS stunnel Not affected
SUSE Linux Enterprise Server 12 SP2 stunnel Not affected
SUSE Linux Enterprise Server 12 SP2-BCL stunnel Not affected
SUSE Linux Enterprise Server 12 SP2-ESPOS stunnel Unsupported
SUSE Linux Enterprise Server 12 SP2-LTSS stunnel Unsupported
SUSE Linux Enterprise Server 12 SP3 stunnel Not affected
SUSE Linux Enterprise Server 12 SP3-BCL stunnel Not affected
SUSE Linux Enterprise Server 12 SP3-ESPOS stunnel Not affected
SUSE Linux Enterprise Server 12 SP3-LTSS stunnel Not affected
SUSE Linux Enterprise Server 12 SP4 stunnel Not affected
SUSE Linux Enterprise Server 12 SP4-ESPOS stunnel Not affected
SUSE Linux Enterprise Server 12 SP4-LTSS stunnel Not affected
SUSE Linux Enterprise Server 15 stunnel Affected
SUSE Linux Enterprise Server 15 SP1 stunnel Unsupported
SUSE Linux Enterprise Server 15 SP1-BCL stunnel Released
SUSE Linux Enterprise Server 15 SP1-LTSS stunnel Released
SUSE Linux Enterprise Server 15 SP2-BCL stunnel Affected
SUSE Linux Enterprise Server 15 SP3-BCL stunnel Affected
SUSE Linux Enterprise Server 15-LTSS stunnel Released
SUSE Linux Enterprise Server for Raspberry Pi 12 SP2 stunnel Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP1 stunnel Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP2 stunnel Unsupported
SUSE Linux Enterprise Server for SAP Applications 12 SP3 stunnel Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP4 stunnel Not affected
SUSE Manager Proxy 4.0 stunnel Released
SUSE Manager Proxy 4.1 stunnel Released
SUSE Manager Proxy 4.2 stunnel Released
SUSE Manager Retail Branch Server 4.0 stunnel Released
SUSE Manager Retail Branch Server 4.1 stunnel Released
SUSE Manager Retail Branch Server 4.2 stunnel Released
SUSE Manager Server 4.0 stunnel Released
SUSE Manager Server 4.1 stunnel Released
SUSE Manager Server 4.2 stunnel Released
SUSE OpenStack Cloud 7 stunnel Unsupported
SUSE OpenStack Cloud Crowbar 8 stunnel Not affected
SUSE OpenStack Cloud Crowbar 9 stunnel Not affected


SUSE Timeline for this CVE

CVE page created: Mon Oct 12 12:03:57 2020
CVE page last modified: Mon Apr 15 15:33:03 2024