CVE-2021-44143

    Dashboard / Vulnerabilities / CVE-2021-44143

    CVE-2021-44143

    Published: 22 Nov 2021Last Modified: 15 Mar 2026

    Summary:

    Details: A flaw was found in mbsync in isync 1.4.0 through 1.4.3. Due to an unchecked condition, a malicious or compromised IMAP server could use a crafted mail message that lacks headers (i.e., one that starts with an empty line) to provoke a heap overflow, which could conceivably be exploited for remote code execution.

    References: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CYZ2GNB4ZO2T27D2XNUWMCS3THZYSJQU/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LCBSY7OZ57XNC6ZYXF6WU5KBSWITZVDX/, https://security.gentoo.org/glsa/202208-15, https://sourceforge.net/p/isync/isync/ref/master/tags/, https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=999804, https://sourceforge.net/p/isync/isync/commit_browser, http://www.openwall.com/lists/oss-security/2021/12/03/2

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    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
    CVE-2021-44143 | CVE-DB