CVE-2020-28020

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    CVE-2020-28020

    Published: 6 May 2021Last Modified: 8 Jul 2026

    Summary:

    Details: Exim 4 before 4.92 allows Integer Overflow to Buffer Overflow, in which an unauthenticated remote attacker can execute arbitrary code by leveraging the mishandling of continuation lines during header-length restriction.

    References: http://www.openwall.com/lists/oss-security/2021/07/25/1, http://www.openwall.com/lists/oss-security/2021/08/03/1, https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28020-HSIZE.txt

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -ae63862ba6f6ee0c17ec865cc6cf0eebb3ca2389

    Affected versions

    exim-4.92-RC5

    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-2020-28020 | CVE-DB