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CVE-2015-5300
The panic_gate check in NTP before 4.2.8p5 is only re-enabled after the first change to the system clock that was greater than 128…
- 7.5HighCVSS base score
- 9.1%Exploitation in 30 daysEPSS · top 4.7% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
The panic_gate check in NTP before 4.2.8p5 is only re-enabled after the first change to the system clock that was greater than 128 milliseconds by default, which allows remote attackers to set NTP to an arbitrary time when started with the -g option, or to alter the time by up to 900 seconds otherwise by responding to an unspecified number of requests from trusted sources, and leveraging a resulting denial of service (abort and restart).
Timeline
ID reserved
By redhat
- 2 years later
· 2 years later
Published
- 7 years later
· 7 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | High7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 9.1% · top 4.7% of all CVEs (9 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
n/a
- affected n/a
References
39
- RHSA-2015:1930 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- SUSE-SU:2016:1912 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- [slackware-security] 20160223 ntp (SSA:2016-054-04) (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- openSUSE-SU:2016:1423 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- USN-2783-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- SUSE-SU:2016:1177 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- https://ics-cert.us-cert.gov/advisories/ICSA-15-356-01 (opens in a new tab)x_refsource_MISCx_transferred
- https://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://support.ntp.org/bin/view/Main/SecurityNotice#January_2016_NTP_4_2_8p5_Securit (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=1271076 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://www-01.ibm.com/support/docview.wss?uid=swg21980676 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://support.citrix.com/article/CTX220112 (opens in a new tab)x_refsource_CONFIRMx_transferred
- FEDORA-2015-77bfbc1bcd (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- https://www.ibm.com/support/home/docdisplay?lndocid=migr-5099428 (opens in a new tab)x_refsource_CONFIRMx_transferred
- FEDORA-2015-f5f5ec7b6b (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- DSA-3388 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- https://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://aix.software.ibm.com/aix/efixes/security/ntp_advisory5.asc (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://www.cs.bu.edu/~goldbe/NTPattack.html (opens in a new tab)x_refsource_MISCx_transferred
- SUSE-SU:2016:2094 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- FEDORA-2016-34bc10a2c8 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- 1034670 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- https://www-01.ibm.com/support/docview.wss?uid=isg3T1024073 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 77312 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- SUSE-SU:2016:1311 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- FreeBSD-SA-16:02 (opens in a new tab)vendor-advisoryx_refsource_FREEBSDx_transferred
- https://www-01.ibm.com/support/docview.wss?uid=swg21979393 (opens in a new tab)x_refsource_CONFIRMx_transferred
- openSUSE-SU:2016:1292 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- https://www-01.ibm.com/support/docview.wss?uid=nas8N1021264 (opens in a new tab)x_refsource_CONFIRMx_transferred
- SUSE-SU:2016:1247 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- https://www-01.ibm.com/support/docview.wss?uid=isg3T1023885 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://bto.bluecoat.com/security-advisory/sa113 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://www-01.ibm.com/support/docview.wss?uid=swg21983501 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://www-01.ibm.com/support/docview.wss?uid=ssg1S1005821 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://support.ntp.org/bin/view/Main/NtpBug2956 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://www-01.ibm.com/support/docview.wss?uid=swg21983506 (opens in a new tab)x_refsource_CONFIRMx_transferred
- SUSE-SU:2016:1175 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- https://security.netapp.com/advisory/ntap-20171004-0001/ (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2015-5276 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2015-5300)Record last updated .