PYSEC-2026-879

    Dashboard / Vulnerabilities / PYSEC-2026-879

    PYSEC-2026-879

    Published: 6 Jul 2026Last Modified: 7 Jul 2026

    Summary: OpenStack Nova Denial of Service in network source security groups

    Details: Algorithmic complexity vulnerability in OpenStack Compute (Nova) before 2013.1.3 and Havana before havana-3 does not properly handle network source security group policy updates, which allows remote authenticated users to cause a denial of service (nova-network consumption) via a large number of server-creation operations, which triggers a large number of update requests.

    References: https://nvd.nist.gov/vuln/detail/CVE-2013-4185, https://bugs.launchpad.net/nova/+bug/1184041, https://github.com/openstack/nova, http://github.com/openstack/nova/commit/52ad911963da4095b213952dee3a430fe0c4c30f, http://github.com/openstack/nova/commit/85aac04704350566d6b06aa7a3b99649946c672c, http://github.com/openstack/nova/commit/d4ee081c5c0a5132781235177c430ebcf72b0b0b, http://rhn.redhat.com/errata/RHSA-2013-1199.html, http://seclists.org/oss-sec/2013/q3/282, https://pypi.org/project/nova, https://github.com/advisories/GHSA-ph2h-hh49-vh27

    Affected packages

    Package

    Name: nova

    Purl: pkg:pypi/nova

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -12.0.0a0

    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