CVE-2015-7977

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

6.29% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 93.4% of scored records. A rank, not a probability.

NVD base score

5.9 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2017-01-30 21:00Z9 YR AGO

Last updated

2024-08-06 08:06Z2 YR AGO

Reserved

2015-10-23

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-476NULL Pointer DereferenceBase

Data version

5.1

Document digest

35bca24dec1dd890a83d2958bec2463d78d8eeb339ca6e42390c70a7147372e6

• tools.cisco.com20160120 Multiple Vulnerabilities in Network Time Protocol Daemon Affecting Cisco Products - January 2016http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160127-ntpdvendor-advisoryx_refsource_CISCO
• www.ubuntu.comUSN-3096-1http://www.ubuntu.com/usn/USN-3096-1vendor-advisoryx_refsource_UBUNTU
• lists.opensuse.orgSUSE-SU-2016:1177http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00060.htmlvendor-advisoryx_refsource_SUSE
• www.debian.orgDSA-3629http://www.debian.org/security/2016/dsa-3629vendor-advisoryx_refsource_DEBIAN
• support.ntp.orghttp://support.ntp.org/bin/view/Main/NtpBug2939x_refsource_CONFIRM
• www.oracle.comhttp://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.htmlx_refsource_CONFIRM
• lists.opensuse.orgSUSE-SU-2016:1912http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.htmlvendor-advisoryx_refsource_SUSE
• www.securitytracker.com1034782http://www.securitytracker.com/id/1034782vdb-entryx_refsource_SECTRACK
• lists.opensuse.orgopenSUSE-SU-2016:1292http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00038.htmlvendor-advisoryx_refsource_SUSE
• www.kb.cert.orgVU#718152https://www.kb.cert.org/vuls/id/718152third-party-advisoryx_refsource_CERT-VN
• lists.opensuse.orgSUSE-SU-2016:1247http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.htmlvendor-advisoryx_refsource_SUSE
• lists.fedoraproject.orgFEDORA-2016-8bb1932088http://lists.fedoraproject.org/pipermail/package-announce/2016-January/176434.htmlvendor-advisoryx_refsource_FEDORA
• rhn.redhat.comRHSA-2016:2583http://rhn.redhat.com/errata/RHSA-2016-2583.htmlvendor-advisoryx_refsource_REDHAT
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20171031-0001/x_refsource_CONFIRM
• www.securityfocus.com81815http://www.securityfocus.com/bid/81815vdb-entryx_refsource_BID
• lists.opensuse.orgSUSE-SU-2016:1311http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.htmlvendor-advisoryx_refsource_SUSE
• rhn.redhat.comRHSA-2016:0780http://rhn.redhat.com/errata/RHSA-2016-0780.htmlvendor-advisoryx_refsource_REDHAT
• support.ntp.orghttp://support.ntp.org/bin/view/Main/SecurityNotice#April_2016_NTP_4_2_8p7_Securityx_refsource_CONFIRM
• lists.fedoraproject.orgFEDORA-2016-34bc10a2c8http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177507.htmlvendor-advisoryx_refsource_FEDORA
• lists.opensuse.orgSUSE-SU-2016:2094http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.htmlvendor-advisoryx_refsource_SUSE
• lists.opensuse.orgSUSE-SU-2016:1175http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00059.htmlvendor-advisoryx_refsource_SUSE
• security.freebsd.orgFreeBSD-SA-16:09https://security.FreeBSD.org/advisories/FreeBSD-SA-16:09.ntp.ascvendor-advisoryx_refsource_FREEBSD
• bto.bluecoat.comhttps://bto.bluecoat.com/security-advisory/sa113x_refsource_CONFIRM
• lists.opensuse.orgopenSUSE-SU-2016:1423http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.htmlvendor-advisoryx_refsource_SUSE
• security.gentoo.orgGLSA-201607-15https://security.gentoo.org/glsa/201607-15vendor-advisoryx_refsource_GENTOO
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdfx_refsource_CONFIRM
• us-cert.cisa.govhttps://us-cert.cisa.gov/ics/advisories/icsa-21-103-11x_refsource_CONFIRM