Vulnerability Description
The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 3.x and 4.x before 4.2.8p2 performs state-variable updates upon receiving certain invalid packets, which makes it easier for man-in-the-middle attackers to cause a denial of service (synchronization loss) by spoofing the source IP address of a peer.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ntp | Ntp | <= 4.2.7p444 |
Related Weaknesses (CWE)
References
- http://bugs.ntp.org/show_bug.cgi?id=2781
- http://listengine.tuxfamily.org/chrony.tuxfamily.org/chrony-announce/2015/04/msg
- http://lists.apple.com/archives/security-announce/2015/Jun/msg00002.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155863.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155864.html
- http://lists.opensuse.org/opensuse-updates/2015-04/msg00052.html
- http://marc.info/?l=bugtraq&m=143213867103400&w=2
- http://marc.info/?l=bugtraq&m=145750740530849&w=2
- http://rhn.redhat.com/errata/RHSA-2015-1459.html
- http://support.apple.com/kb/HT204942
- http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_VulnerabilitiesVendor Advisory
- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20
- http://tools.cisco.com/security/center/viewAlert.x?alertId=38275
- http://www.debian.org/security/2015/dsa-3222
- http://www.debian.org/security/2015/dsa-3223
FAQ
What is CVE-2015-1799?
CVE-2015-1799 is a vulnerability with a CVSS score of 4.3 (MEDIUM). The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 3.x and 4.x before 4.2.8p2 performs state-variable updates upon receiving certain invalid packets, which makes it easier...
How severe is CVE-2015-1799?
CVE-2015-1799 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2015-1799?
Check the references section above for vendor advisories and patch information. Affected products include: Ntp Ntp.