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    CVE-2024-39929

    Exim through 4.97.1 misparses a multiline RFC 2231 header filename, and thus remote attackers can bypass a $mime_filename extension-blocking protection mechanism, and potentially deliver executable attachments to the mailboxes of end users.

    Published:Jul 4, 2024
    Last Modified:Jul 10, 2025
    EPS:Jul 4, 2024
    EPSS Score:0.57751
    CVSS Score:5.4

    Affected Products

    Vendor
    Exim
    Product
    Exim

    Exploits

    https://bugs.exim.org/show_bug.cgi?id=3099#c4https://bugs.exim.org/show_bug.cgi?id=3099#c4https://github.com/michael-david-fry/CVE-2024-39929https://github.com/rxerium/CVE-2024-39929

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs
    CAPEC-104 Cross Zone Scripting
    CAPEC-107 Cross Site Tracing
    CAPEC-127 Directory Indexing
    CAPEC-17 Using Malicious Files
    CAPEC-20 Encryption Brute Forcing
    CAPEC-22 Exploiting Trust in Client
    CAPEC-237 Escaping a Sandbox by Calling Code in Another Language
    CAPEC-36 Using Unpublished Interfaces or Functionality
    CAPEC-477 Signature Spoofing by Mixing Signed and Unsigned Content
    CAPEC-480 Escaping Virtualization
    CAPEC-51 Poison Web Service Registry
    CAPEC-57 Utilizing REST's Trust in the System Resource to Obtain Sensitive Data
    CAPEC-59 Session Credential Falsification through Prediction
    CAPEC-65 Sniff Application Code
    CAPEC-668 Key Negotiation of Bluetooth Attack (KNOB)
    CAPEC-73 User-Controlled Filename
    CAPEC-74 Manipulating State
    CAPEC-81 Web Server Logs Tampering
    CAPEC-85 AJAX Footprinting
    CAPEC-87 Forceful Browsing

    Related CVEs

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    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