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TI-2015-06390 Aliases CVE-2015-7691GHSA-2cm3-5rf2-6c3w

The crypto_xmit function in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77…

Priority MEDIUM 43CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 16 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

The crypto_xmit function in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service (crash) via crafted packets containing particular autokey operations. NOTE: This vulnerability exists due to an incomplete fix for CVE-2014-9750.

Why it matters now

EPSS 0.07103 94th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 16 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 44

CPEVersionsRoleVendor
cpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:*4.2.0 to before 4.2.8; 4.3.0 to before 4.3.77VulnerableNTP Project
cpe:2.3:a:ntp:ntp:4.2.8:-:*:*:*:*:*:*4.2.8VulnerableNTP Project
cpe:2.3:a:ntp:ntp:4.2.8:p1:*:*:*:*:*:*4.2.8 p1VulnerableNTP Project
cpe:2.3:a:ntp:ntp:4.2.8:p1-beta1:*:*:*:*:*:*4.2.8 p1-beta1VulnerableNTP Project
cpe:2.3:a:ntp:ntp:4.2.8:p1-beta2:*:*:*:*:*:*4.2.8 p1-beta2VulnerableNTP Project
cpe:2.3:a:ntp:ntp:4.2.8:p1-beta3:*:*:*:*:*:*4.2.8 p1-beta3VulnerableNTP Project
cpe:2.3:a:ntp:ntp:4.2.8:p1-beta4:*:*:*:*:*:*4.2.8 p1-beta4VulnerableNTP Project
cpe:2.3:a:ntp:ntp:4.2.8:p1-beta5:*:*:*:*:*:*4.2.8 p1-beta5VulnerableNTP Project
cpe:2.3:a:ntp:ntp:4.2.8:p1-rc1:*:*:*:*:*:*4.2.8 p1-rc1VulnerableNTP Project
cpe:2.3:a:ntp:ntp:4.2.8:p1-rc2:*:*:*:*:*:*4.2.8 p1-rc2VulnerableNTP Project
  • cpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:* Versions 4.2.0 to before 4.2.8; 4.3.0 to before 4.3.77 Vulnerable ·NTP Project
  • cpe:2.3:a:ntp:ntp:4.2.8:-:*:*:*:*:*:* Versions 4.2.8 Vulnerable ·NTP Project
  • cpe:2.3:a:ntp:ntp:4.2.8:p1:*:*:*:*:*:* Versions 4.2.8 p1 Vulnerable ·NTP Project
  • cpe:2.3:a:ntp:ntp:4.2.8:p1-beta1:*:*:*:*:*:* Versions 4.2.8 p1-beta1 Vulnerable ·NTP Project
  • cpe:2.3:a:ntp:ntp:4.2.8:p1-beta2:*:*:*:*:*:* Versions 4.2.8 p1-beta2 Vulnerable ·NTP Project
  • cpe:2.3:a:ntp:ntp:4.2.8:p1-beta3:*:*:*:*:*:* Versions 4.2.8 p1-beta3 Vulnerable ·NTP Project
  • cpe:2.3:a:ntp:ntp:4.2.8:p1-beta4:*:*:*:*:*:* Versions 4.2.8 p1-beta4 Vulnerable ·NTP Project
  • cpe:2.3:a:ntp:ntp:4.2.8:p1-beta5:*:*:*:*:*:* Versions 4.2.8 p1-beta5 Vulnerable ·NTP Project
  • cpe:2.3:a:ntp:ntp:4.2.8:p1-rc1:*:*:*:*:*:* Versions 4.2.8 p1-rc1 Vulnerable ·NTP Project
  • cpe:2.3:a:ntp:ntp:4.2.8:p1-rc2:*:*:*:*:*:* Versions 4.2.8 p1-rc2 Vulnerable ·NTP Project
Show 34 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:ntp:ntp:4.2.8:p2:*:*:*:*:*:*4.2.8 p2VulnerableNTP Project
cpe:2.3:a:ntp:ntp:4.2.8:p2-rc1:*:*:*:*:*:*4.2.8 p2-rc1VulnerableNTP Project
cpe:2.3:a:ntp:ntp:4.2.8:p2-rc2:*:*:*:*:*:*4.2.8 p2-rc2VulnerableNTP Project
cpe:2.3:a:ntp:ntp:4.2.8:p2-rc3:*:*:*:*:*:*4.2.8 p2-rc3VulnerableNTP Project
cpe:2.3:a:ntp:ntp:4.2.8:p3:*:*:*:*:*:*4.2.8 p3VulnerableNTP Project
cpe:2.3:a:ntp:ntp:4.2.8:p3-rc1:*:*:*:*:*:*4.2.8 p3-rc1VulnerableNTP Project
cpe:2.3:a:ntp:ntp:4.2.8:p3-rc2:*:*:*:*:*:*4.2.8 p3-rc2VulnerableNTP Project
cpe:2.3:a:ntp:ntp:4.2.8:p3-rc3:*:*:*:*:*:*4.2.8 p3-rc3VulnerableNTP Project
cpe:2.3:o:oracle:linux:6:-:*:*:*:*:*:*6VulnerableOracle
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*7.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:a:netapp:oncommand_performance_manager:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:netapp:oncommand_unified_manager:-:*:*:*:*:clustered_data_ontap:*:*not specified by NVDVulnerableNetApp
cpe:2.3:o:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:o:netapp:data_ontap:-:*:*:*:*:7-mode:*:*not specified by NVDVulnerableNetApp
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:*7.3VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*7.4VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.7:*:*:*:*:*:*:*7.7VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.3:*:*:*:*:*:*:*7.3VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:*7.4VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:*7.5VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.7:*:*:*:*:*:*:*7.7VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.3:*:*:*:*:*:*:*7.3VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.7:*:*:*:*:*:*:*7.7VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
  • cpe:2.3:a:ntp:ntp:4.2.8:p2:*:*:*:*:*:* Versions 4.2.8 p2 Vulnerable ·NTP Project
  • cpe:2.3:a:ntp:ntp:4.2.8:p2-rc1:*:*:*:*:*:* Versions 4.2.8 p2-rc1 Vulnerable ·NTP Project
  • cpe:2.3:a:ntp:ntp:4.2.8:p2-rc2:*:*:*:*:*:* Versions 4.2.8 p2-rc2 Vulnerable ·NTP Project
  • cpe:2.3:a:ntp:ntp:4.2.8:p2-rc3:*:*:*:*:*:* Versions 4.2.8 p2-rc3 Vulnerable ·NTP Project
  • cpe:2.3:a:ntp:ntp:4.2.8:p3:*:*:*:*:*:* Versions 4.2.8 p3 Vulnerable ·NTP Project
  • cpe:2.3:a:ntp:ntp:4.2.8:p3-rc1:*:*:*:*:*:* Versions 4.2.8 p3-rc1 Vulnerable ·NTP Project
  • cpe:2.3:a:ntp:ntp:4.2.8:p3-rc2:*:*:*:*:*:* Versions 4.2.8 p3-rc2 Vulnerable ·NTP Project
  • cpe:2.3:a:ntp:ntp:4.2.8:p3-rc3:*:*:*:*:*:* Versions 4.2.8 p3-rc3 Vulnerable ·NTP Project
  • cpe:2.3:o:oracle:linux:6:-:*:*:*:*:*:* Versions 6 Vulnerable ·Oracle
  • cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:a:netapp:oncommand_performance_manager:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:a:netapp:oncommand_unified_manager:-:*:*:*:*:clustered_data_ontap:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:o:netapp:clustered_data_ontap:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:o:netapp:data_ontap:-:*:*:*:*:7-mode:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:* Versions 7.3 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:7.7:*:*:*:*:*:*:* Versions 7.7 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.3:*:*:*:*:*:*:* Versions 7.3 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:* Versions 7.5 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.7:*:*:*:*:*:*:* Versions 7.7 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_tus:7.3:*:*:*:*:*:*:* Versions 7.3 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_tus:7.7:*:*:*:*:*:*:* Versions 7.7 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat

Remediation

Red Hat 2 advisories

  • RHSA-2016:2583 Released 2016-11-03 · Red Hat rating Moderate
    ntp security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) ntp-4.2.6p5-25.el7, ntpdate-4.2.6p5-25.el7
    • Red Hat Enterprise Linux Client Optional (v. 7) ntp-doc-4.2.6p5-25.el7, ntp-perl-4.2.6p5-25.el7, sntp-4.2.6p5-25.el7
    • Red Hat Enterprise Linux ComputeNode (v. 7) ntp-4.2.6p5-25.el7, ntpdate-4.2.6p5-25.el7
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) ntp-doc-4.2.6p5-25.el7, ntp-perl-4.2.6p5-25.el7, sntp-4.2.6p5-25.el7
    • Red Hat Enterprise Linux Server (v. 7) ntp-4.2.6p5-25.el7, ntpdate-4.2.6p5-25.el7
    • Red Hat Enterprise Linux Server Optional (v. 7) ntp-doc-4.2.6p5-25.el7, ntp-perl-4.2.6p5-25.el7, sntp-4.2.6p5-25.el7
    • Red Hat Enterprise Linux Workstation (v. 7) ntp-4.2.6p5-25.el7, ntpdate-4.2.6p5-25.el7
    • Red Hat Enterprise Linux Workstation Optional (v. 7) ntp-doc-4.2.6p5-25.el7, ntp-perl-4.2.6p5-25.el7, sntp-4.2.6p5-25.el7
  • RHSA-2016:0780 Released 2016-05-10 · Red Hat rating Moderate
    ntp security and bug fix update
    • Red Hat Enterprise Linux Desktop (v. 6) ntp-4.2.6p5-10.el6, ntpdate-4.2.6p5-10.el6
    • Red Hat Enterprise Linux Desktop Optional (v. 6) ntp-doc-4.2.6p5-10.el6, ntp-perl-4.2.6p5-10.el6
    • Red Hat Enterprise Linux HPC Node (v. 6) ntp-4.2.6p5-10.el6, ntpdate-4.2.6p5-10.el6
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) ntp-doc-4.2.6p5-10.el6, ntp-perl-4.2.6p5-10.el6
    • Red Hat Enterprise Linux Server (v. 6) ntp-4.2.6p5-10.el6, ntpdate-4.2.6p5-10.el6
    • Red Hat Enterprise Linux Server Optional (v. 6) ntp-doc-4.2.6p5-10.el6, ntp-perl-4.2.6p5-10.el6
    • Red Hat Enterprise Linux Workstation (v. 6) ntp-4.2.6p5-10.el6, ntpdate-4.2.6p5-10.el6
    • Red Hat Enterprise Linux Workstation Optional (v. 6) ntp-doc-4.2.6p5-10.el6, ntp-perl-4.2.6p5-10.el6

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2016:2583
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2016:2583
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2016:2583
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2016:2583
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2016:0780
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2016:0780
Red Hat Enterprise Linux HPC Node (v. 6)Fixed RHSA-2016:0780
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2016:0780
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2016:0780
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2016:2583
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2016:0780
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2016:2583
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2016:0780
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2016:2583
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2016:0780
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2016:2583

Timeline

  1. 2026-10-02 Threatist record created from CVE-2015-7691
  2. 2026-10-03 Alias added: GHSA-2cm3-5rf2-6c3w

References

Advisory 8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences