MGASA-2014-0080

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    MGASA-2014-0080

    Published: 17 Feb 2014Last Modified: 16 Apr 2026
    Upstream:
    CVE-2013-6890

    Summary: Updated denyhosts package fixes security vulnerability

    Details: Helmut Grohne discovered that denyhosts, a tool preventing SSH brute-force attacks, could be used to perform remote denial of service against the SSH daemon. Incorrectly specified regular expressions used to detect brute force attacks in authentication logs could be exploited by a malicious user to forge crafted login names in order to make denyhosts ban arbitrary IP addresses (CVE-2013-6890). This update also includes a fix for a regression introduced when fixing CVE-2013-6890.

    References: https://advisories.mageia.org/MGASA-2014-0080.html, https://bugs.mageia.org/show_bug.cgi?id=12092, http://www.debian.org/security/2013/dsa-2826, https://lists.debian.org/debian-security-announce/2014/msg00018.html

    Affected packages

    Package

    Name: denyhosts

    Purl: pkg:rpm/mageia/denyhosts?arch=source&distro=mageia-3

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2.6-4.4.mga3

    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
    MGASA-2014-0080 | CVE-DB