CVE-2016-1549
First published: Fri Jan 06 2017(Updated: )
A malicious authenticated peer can create arbitrarily-many ephemeral associations in order to win the clock selection algorithm in ntpd in NTP 4.2.8p4 and earlier and NTPsec 3e160db8dc248a0bcb053b56a80167dc742d2b74 and a5fb34b9cc89b92a8fef2f459004865c93bb7f92 and modify a victim's clock.
Credit: cret@cert.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| NTP | =4.2.8-p4 |
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Reference Links
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- http://www.securityfocus.com/bid/88200
- http://www.securitytracker.com/id/1035705
- http://www.talosintelligence.com/reports/TALOS-2016-0083/
- https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc
- https://security.gentoo.org/glsa/201607-15
- https://security.netapp.com/advisory/ntap-20171004-0002/
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_us
- https://www.synology.com/support/security/Synology_SA_18_13
Frequently Asked Questions
What is the severity of CVE-2016-1549?
CVE-2016-1549 is considered a high severity vulnerability due to its potential to compromise time synchronization.
How do I fix CVE-2016-1549?
To fix CVE-2016-1549, upgrade NTP to version 4.2.8p5 or later, as well as ensure that you are using the latest version of NTPsec.
What impact does CVE-2016-1549 have on affected systems?
CVE-2016-1549 allows a malicious authenticated peer to manipulate the clock selection process, potentially leading to unauthorized time changes.
Which versions of NTP are affected by CVE-2016-1549?
CVE-2016-1549 affects NTP version 4.2.8p4 and all earlier versions.
Can CVE-2016-1549 be exploited remotely?
CVE-2016-1549 requires malicious users to have authenticated access to the NTP server to exploit the vulnerability.
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- version/ntp/4.2.8-p4