DEBIAN-CVE-2021-20247

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    DEBIAN-CVE-2021-20247

    Published: 23 Feb 2021Last Modified: 1 Sept 2026
    Upstream:
    CVE-2021-20247

    Summary:

    Details: A flaw was found in mbsync before v1.3.5 and v1.4.1. Validations of the mailbox names returned by IMAP LIST/LSUB do not occur allowing a malicious or compromised server to use specially crafted mailbox names containing '..' path components to access data outside the designated mailbox on the opposite end of the synchronization channel. The highest threat from this vulnerability is to data confidentiality and integrity.

    References: https://security-tracker.debian.org/tracker/CVE-2021-20247

    Affected packages

    Package

    Name: isync

    Purl: pkg:deb/debian/isync?arch=source&distro=bookworm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.3.0-2.1

    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
    DEBIAN-CVE-2021-20247 | CVE-DB