Description
Multiple stack-based buffer overflows in ntpd in NTP before 4.2.8 allow remote attackers to execute arbitrary code via a crafted packet, related to (1) the crypto_recv function when the Autokey Authentication feature is used, (2) the ctl_putdata function, and (3) the configure function.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 11 | ntp | 1:4.2.6.p5+dfsg-3.2 | — |
| Debian 7 | ntp | 1:4.2.6.p5+dfsg-2+deb7u1 | DSA-3108-1 |
| Debian 6.0 | ntp | 1:4.2.6.p2+dfsg-1+deb6u1 | DLA-116-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | ntp | 1:4.2.6.p5+dfsg-3ubuntu2.14.04.1 | USN-2449-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | ntp +4 | 4.2.6p5-19.el7_0 | RHSA-2014:2024 |
| RHEL 6 | ntp +3 | 4.2.6p5-2.el6_6 | RHSA-2014:2024 |
| RHEL 5 | ntp | 4.2.2p1-18.el5_11 | RHSA-2014:2025 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6.5 EUS | ntp +3 | 4.2.6p5-2.el6_5 | RHSA-2015:0104 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | ntp | 4.2.8p9-1.1 | openSUSE-SU-2024:10181-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | ntp +4 | 4.2.6p5-19.el7_0 | ELSA-2014-2024 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
-
MacMiniVault/NTPUpdateSnowLeopard ★ 5 · Dec 26, 2014
Updates OS X 10.6.8 NTP to include patch for CVE-2014-9295
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 10
- RHSA-2015:0104 Red Hat Security Advisory: ntp security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2014:2024 Red Hat Security Advisory: ntp security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2014:2025 Red Hat Security Advisory: ntp security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- DSA-3108-1 ntp - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-116-1 ntp - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-2449-1 ntp vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- openSUSE-SU-2024:10181-1 ntp-4.2.8p9-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- ICSA-14-353-01C Network Time Protocol Vulnerabilities CISA ICS & IT advisories · Jun 6, 2025
- VDE-2022-032 AUMA: Multiple Vulnerabilities in Automation Runtime NTP Service CERT@VDE · Aug 9, 2022
- ELSA-2014-2024 Important: ntp security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Dec 20, 2014
References
- 20141222 Multiple Vulnerabilities in ntpd Affecting Cisco Products vendor-advisory
- 71761 vdb-entry
- HPSBGN03277 vendor-advisory
- https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04790232
- http://bugs.ntp.org/show_bug.cgi?id=2667
- https://kc.mcafee.com/corporate/index?page=content&id=SB10103
- http://advisories.mageia.org/MGASA-2014-0541.html
- VU#852879 third-party-advisory
- HPSBUX03240 vendor-advisory
- RHSA-2014:2025 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1176037
- 62209 third-party-advisory
- http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
- RHSA-2015:0104 vendor-advisory
- HPSBOV03505 vendor-advisory
- http://bk1.ntp.org/ntp-dev/?PAGE=patch&REV=548acc4dN1TbM1tRJrbPcA4yc1aTdA
- https://help.ecostruxureit.com/display/public/UADCO8x/StruxureWare+Data+Center+Operation+Software+Vulnerability+Fixes
- http://bugs.ntp.org/show_bug.cgi?id=2668
- http://bk1.ntp.org/ntp-dev/?PAGE=patch&REV=548acdf3tUSFizXcv_X4b77Jt_Y-cg
- openSUSE-SU-2014:1670 vendor-advisory
- http://bk1.ntp.org/ntp-dev/?PAGE=patch&REV=548acf55dxKfhb6MuYQwzu8eDlS97g
- http://support.ntp.org/bin/view/Main/SecurityNotice
- HPSBPV03266 vendor-advisory
- https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04916783
- http://www1.huawei.com/en/security/psirt/security-bulletins/security-advisories/hw-417665.htm
- MDVSA-2015:003 vendor-advisory
- http://bugs.ntp.org/show_bug.cgi?id=2669
- https://www.arista.com/en/support/advisories-notices/security-advisories/1047-security-advisory-8