CVE-2015-1798

    Dashboard / Vulnerabilities / CVE-2015-1798

    CVE-2015-1798

    Published: 8 Apr 2015Last Modified: 16 Apr 2026

    Summary:

    Details: The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC.

    References: http://rhn.redhat.com/errata/RHSA-2015-1459.html, http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities, http://www.debian.org/security/2015/dsa-3223, http://www.kb.cert.org/vuls/id/374268, http://www.mandriva.com/security/advisories?name=MDVSA-2015:202, http://www.ubuntu.com/usn/USN-2567-1, https://security.gentoo.org/glsa/201509-01, http://bugs.ntp.org/show_bug.cgi?id=2779, http://lists.apple.com/archives/security-announce/2015/Jun/msg00002.html, http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155863.html, http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155864.html, http://lists.opensuse.org/opensuse-updates/2015-04/msg00052.html, http://marc.info/?l=bugtraq&m=143213867103400&w=2, http://support.apple.com/kb/HT204942, http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150408-ntpd, http://tools.cisco.com/security/center/viewAlert.x?alertId=38276, http://www.kb.cert.org/vuls/id/374268, http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html, http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html, http://www.securityfocus.com/bid/73951, http://www.securitytracker.com/id/1032032, https://kc.mcafee.com/corporate/index?page=content&id=SB10114

    Affected packages

    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
    CVE-2015-1798 | CVE-DB