CVE-2021-38084

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    CVE-2021-38084

    Published: 3 Aug 2021Last Modified: 7 Aug 2026

    Summary:

    Details: An issue was discovered in the POP3 component of Courier Mail Server before 1.1.5. Meddler-in-the-middle attackers can pipeline commands after the POP3 STLS command, injecting plaintext commands into an encrypted user session.

    References: https://sourceforge.net/p/courier/mailman/courier-imap/thread/cone.1382574216.483027.8082.1000%40monster.email-scan.com/#msg31555583, https://sourceforge.net/p/courier/mailman/message/37329216/

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -368f9fb227b46406643b9425db604a0594f71dfe

    Affected versions

    courier/1.1.4/20210518212001
    courier/1.1.3/20210424125125
    courier/1.1.2/20210326200147
    courier/1.1.1/20210320170424
    courier/1.1.0/20210319215318

    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
    CVE-2021-38084 | CVE-DB