Linux Security
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    RedHat: RHSA-2021-0618:01 Important: stunnel security update

    Date 22 Feb 2021
    118
    Posted By LinuxSecurity Advisories
    An update for stunnel is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability
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    =====================================================================
                       Red Hat Security Advisory
    
    Synopsis:          Important: stunnel security update
    Advisory ID:       RHSA-2021:0618-01
    Product:           Red Hat Enterprise Linux
    Advisory URL:      https://access.redhat.com/errata/RHSA-2021:0618
    Issue date:        2021-02-22
    CVE Names:         CVE-2021-20230 
    =====================================================================
    
    1. Summary:
    
    An update for stunnel is now available for Red Hat Enterprise Linux 8.
    
    Red Hat Product Security has rated this update as having a security impact
    of Important. A Common Vulnerability Scoring System (CVSS) base score,
    which gives a detailed severity rating, is available for each vulnerability
    from the CVE link(s) in the References section.
    
    2. Relevant releases/architectures:
    
    Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, ppc64le, s390x, x86_64
    
    3. Description:
    
    Stunnel is a wrapper for network connections. It can be used to tunnel an
    unencrypted network connection over an encrypted connection (encrypted
    using SSL or TLS) or to provide an encrypted means of connecting to
    services that do not natively support encryption.
    
    Security Fix(es):
    
    * stunnel: client certificate not correctly verified when redirect and
    verifyChain options are used (CVE-2021-20230)
    
    For more details about the security issue(s), including the impact, a CVSS
    score, acknowledgments, and other related information, refer to the CVE
    page(s) listed in the References section.
    
    4. Solution:
    
    For details on how to apply this update, which includes the changes
    described in this advisory, refer to:
    
    https://access.redhat.com/articles/11258
    
    5. Bugs fixed (https://bugzilla.redhat.com/):
    
    1925226 - CVE-2021-20230 stunnel: client certificate not correctly verified when redirect and verifyChain options are used
    
    6. Package List:
    
    Red Hat Enterprise Linux BaseOS (v. 8):
    
    Source:
    stunnel-5.56-5.el8_3.src.rpm
    
    aarch64:
    stunnel-5.56-5.el8_3.aarch64.rpm
    stunnel-debuginfo-5.56-5.el8_3.aarch64.rpm
    stunnel-debugsource-5.56-5.el8_3.aarch64.rpm
    
    ppc64le:
    stunnel-5.56-5.el8_3.ppc64le.rpm
    stunnel-debuginfo-5.56-5.el8_3.ppc64le.rpm
    stunnel-debugsource-5.56-5.el8_3.ppc64le.rpm
    
    s390x:
    stunnel-5.56-5.el8_3.s390x.rpm
    stunnel-debuginfo-5.56-5.el8_3.s390x.rpm
    stunnel-debugsource-5.56-5.el8_3.s390x.rpm
    
    x86_64:
    stunnel-5.56-5.el8_3.x86_64.rpm
    stunnel-debuginfo-5.56-5.el8_3.x86_64.rpm
    stunnel-debugsource-5.56-5.el8_3.x86_64.rpm
    
    These packages are GPG signed by Red Hat for security.  Our key and
    details on how to verify the signature are available from
    https://access.redhat.com/security/team/key/
    
    7. References:
    
    https://access.redhat.com/security/cve/CVE-2021-20230
    https://access.redhat.com/security/updates/classification/#important
    
    8. Contact:
    
    The Red Hat security contact is . More contact
    details at https://access.redhat.com/security/team/contact/
    
    Copyright 2021 Red Hat, Inc.
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