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    CVE-2023-26433

    When adding an external mail account, processing of IMAP "capabilities" responses are not limited to plausible sizes. Attacker with access to a rogue IMAP service could trigger requests that lead to excessive resource usage and eventually service unavailability. We now limit accepted IMAP server response to reasonable length/size. No publicly available exploits are known.

    Published:Jun 20, 2023
    Last Modified:Nov 21, 2024
    EPS:Jun 20, 2023
    EPSS Score:0.00098
    CVSS Score:4.3

    Affected Products

    Vendor
    Open-xchange
    Product
    Open-xchange Appsuite Backend

    Exploits

    No exploit reference

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    CVE-2023-26434 (CVSS 4.3) — When adding an external mail account, processing of POP3 "capabilities" responses are not limited to plausible…
    CVE-2023-26432 (CVSS 4.3) — When adding an external mail account, processing of SMTP "capabilities" responses are not limited to plausible…
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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