What’s Vulnerable › Vulnerabilities

CVE-2017-6458

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 6.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-03-27 · updated 2026-06-17
• Weakness: CWE-119

Description

Multiple buffer overflows in the ctl_put* functions in NTP before 4.2.8p10 and 4.3.x before 4.3.94 allow remote authenticated users to have unspecified impact via a long variable.

Affected products

• macOS: from 10.8.0 before 10.13 — fixed in 10.13
• HPE Hpux-Ntp: before c.4.2.8.4.0 — fixed in c.4.2.8.4.0
• NTP: before 4.2.8; from 4.3.0 before 4.3.94; 4.2.8, 4.2.8-p1, 4.2.8-p1-beta1, 4.2.8-p1-beta2, 4.2.8-p1-beta3, 4.2.8-p1-beta4 (+17) — fixed in 4.2.8, 4.3.94
• Siemens Simatic Net Cp 443-1 Opc Ua Firmware: all versions

How to fix

Upgrade to a fixed version: macOS 10.13; HPE Hpux-Ntp c.4.2.8.4.0; NTP 4.2.8, 4.3.94. Check the vendor advisory for mitigations.

References

• http://packetstormsecurity.com/files/142284/Slackware-Security-Advisory-ntp-Updates.html
• http://seclists.org/fulldisclosure/2017/Nov/7
• http://seclists.org/fulldisclosure/2017/Sep/62
• http://support.ntp.org/bin/view/Main/NtpBug3379
• http://support.ntp.org/bin/view/Main/SecurityNotice#March_2017_ntp_4_2_8p10_NTP_Secu
• http://www.securityfocus.com/archive/1/archive/1/540464/100/0/threaded
• http://www.securityfocus.com/bid/97051
• http://www.securitytracker.com/id/1038123
• http://www.ubuntu.com/usn/USN-3349-1
• https://bto.bluecoat.com/security-advisory/sa147
• https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4B7BMVXV53EE7XYW2KAVETDHTP452O3Z/

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