UBUNTU-CVE-2023-34966

    Dashboard / Vulnerabilities / UBUNTU-CVE-2023-34966

    UBUNTU-CVE-2023-34966

    Published: 19 Jul 2023Last Modified: 22 Apr 2026
    Upstream:
    CVE-2023-34966

    Summary:

    Details: An infinite loop vulnerability was found in Samba's mdssvc RPC service for Spotlight. When parsing Spotlight mdssvc RPC packets sent by the client, the core unmarshalling function sl_unpack_loop() did not validate a field in the network packet that contains the count of elements in an array-like structure. By passing 0 as the count value, the attacked function will run in an endless loop consuming 100% CPU. This flaw allows an attacker to issue a malformed RPC request, triggering an infinite loop, resulting in a denial of service condition.

    References: https://ubuntu.com/security/CVE-2023-34966, https://www.samba.org/samba/security/CVE-2023-34966.html, https://ubuntu.com/security/notices/USN-6238-1, https://www.cve.org/CVERecord?id=CVE-2023-34966, https://ubuntu.com/security/notices/USN-7582-1

    Affected packages

    Package

    Name: samba

    Purl: pkg:deb/ubuntu/samba@2:4.3.11+dfsg-0ubuntu0.14.04.20+esm13?arch=source&distro=esm-infra-legacy/trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2:4.3.11+dfsg-0ubuntu0.14.04.20+esm13

    Affected versions

    2:3.6.18-1ubuntu3

    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-2023-34966 | CVE-DB