RLSA-2021:0618

    Dashboard / Vulnerabilities / RLSA-2021:0618

    RLSA-2021:0618

    Published: 22 Feb 2021Last Modified: 4 Feb 2026
    Upstream:
    CVE-2021-20230

    Summary: Important: stunnel security update

    Details: 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.

    References: https://errata.rockylinux.org/RLSA-2021:0618, https://bugzilla.redhat.com/show_bug.cgi?id=1925226

    Affected packages

    Package

    Name: stunnel

    Purl: pkg:rpm/rocky-linux/stunnel?distro=rocky-linux-8&epoch=0

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0:5.56-5.el8_3

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    RLSA-2021:0618 | CVE-DB