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    CVE-2015-7977

    ntpd in NTP before 4.2.8p6 and 4.3.x before 4.3.90 allows remote attackers to cause a denial of service (NULL pointer dereference) via a ntpdc reslist command.

    Published:Jan 20, 2016
    Last Modified:Apr 20, 2025
    EPS:Jan 30, 2017
    EPSS Score:0.09711
    CVSS Score:5.9

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Freebsd
    Product
    Freebsd
    Vendor
    Netapp
    Product
    Clustered Data Ontap
    Vendor
    Netapp
    Product
    Oncommand Balance
    Vendor
    Ntp
    Product
    Ntp
    Vendor
    Oracle
    Product
    Linux
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Siemens
    Product
    Tim 4r-ie
    Vendor
    Siemens
    Product
    Tim 4r-ie Dnp3
    Vendor
    Siemens
    Product
    Tim 4r-ie Dnp3 Firmware
    Vendor
    Siemens
    Product
    Tim 4r-ie Firmware

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-476 NULL Pointer Dereference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-13367 (CVSS 7.8) — IBM Informix Dynamic Server 14.10, and 15.0 contain a local privilege escalation vulnerability in the oninit s…
    CVE-2026-47337 (CVSS 3.3) — Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling …
    CVE-2026-47336 (CVSS 3.3) — Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/A…
    CVE-2026-47335 (CVSS 5.5) — Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor n…
    CVE-2026-47334 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock…
    CVE-2026-47333 (CVSS 7.8) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the si…
    CVE-2026-47332 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly validate the size of an intern…
    CVE-2026-47331 (CVSS 7.8) — Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An…
    CVE-2026-47330 (CVSS 3.3) — Ubuntu Linux 6.8, 7.17 and 7.0 contain AppArmor SAUCE patches which can, under certain circumstances, use an u…

    References

    http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177507.html
    http://lists.fedoraproject.org/pipermail/package-announce/2016-January/176434.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00059.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00060.html
    http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.html
    http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00038.html
    http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html
    http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html
    http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html
    http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html
    http://rhn.redhat.com/errata/RHSA-2016-0780.html
    http://rhn.redhat.com/errata/RHSA-2016-2583.html
    http://support.ntp.org/bin/view/Main/NtpBug2939
    http://support.ntp.org/bin/view/Main/SecurityNotice#April_2016_NTP_4_2_8p7_Security
    http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160127-ntpd
    http://www.debian.org/security/2016/dsa-3629
    http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
    http://www.securityfocus.com/bid/81815
    http://www.securitytracker.com/id/1034782
    http://www.ubuntu.com/usn/USN-3096-1
    https://bto.bluecoat.com/security-advisory/sa113
    https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf
    https://security.FreeBSD.org/advisories/FreeBSD-SA-16:09.ntp.asc
    https://security.gentoo.org/glsa/201607-15
    https://security.netapp.com/advisory/ntap-20171031-0001/
    https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11
    https://www.kb.cert.org/vuls/id/718152
    http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177507.html
    http://lists.fedoraproject.org/pipermail/package-announce/2016-January/176434.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00059.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00060.html
    http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.html
    http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00038.html
    http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html
    http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html
    http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html
    http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html
    http://rhn.redhat.com/errata/RHSA-2016-0780.html
    http://rhn.redhat.com/errata/RHSA-2016-2583.html
    http://support.ntp.org/bin/view/Main/NtpBug2939
    http://support.ntp.org/bin/view/Main/SecurityNotice#April_2016_NTP_4_2_8p7_Security
    http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160127-ntpd
    http://www.debian.org/security/2016/dsa-3629
    http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
    http://www.securityfocus.com/bid/81815
    http://www.securitytracker.com/id/1034782
    http://www.ubuntu.com/usn/USN-3096-1
    https://bto.bluecoat.com/security-advisory/sa113
    https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf
    https://security.FreeBSD.org/advisories/FreeBSD-SA-16:09.ntp.asc
    https://security.gentoo.org/glsa/201607-15
    https://security.netapp.com/advisory/ntap-20171031-0001/
    https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11
    https://www.kb.cert.org/vuls/id/718152

    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