UBUNTU-CVE-2023-3255

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    UBUNTU-CVE-2023-3255

    Published: 13 Sept 2023Last Modified: 4 Feb 2026
    Upstream:
    CVE-2023-3255
    Aliases:
    USN-6567-1

    Summary:

    Details: A flaw was found in the QEMU built-in VNC server while processing ClientCutText messages. A wrong exit condition may lead to an infinite loop when inflating an attacker controlled zlib buffer in the `inflate_buffer` function. This could allow a remote authenticated client who is able to send a clipboard to the VNC server to trigger a denial of service.

    References: https://ubuntu.com/security/CVE-2023-3255, https://lists.nongnu.org/archive/html/qemu-devel/2023-07/msg00596.html, https://ubuntu.com/security/notices/USN-6567-1, https://www.cve.org/CVERecord?id=CVE-2023-3255

    Affected packages

    Package

    Name: qemu

    Purl: pkg:deb/ubuntu/qemu@1:6.2+dfsg-2ubuntu6.16?arch=source&distro=jammy

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1:6.2+dfsg-2ubuntu6.16

    Affected versions

    1:6.0+dfsg-2expubuntu1

    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
    UBUNTU-CVE-2023-3255 | CVE-DB