Vulnerability in NTP
CVE-2015-1799
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.
Published · last modified .
CVSS v2 metric
CVSS v2 base score 4.3 (Medium). Vector: AV:A/AC:M/Au:N/C:N/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.009 (58.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.debian.org/security/2015/dsa-3222 (vendor-advisory)
- tools.cisco.com/security/center/viewAlert.x (vendor-advisory)
- listengine.tuxfamily.org/chrony.tuxfamily.org/chrony-announce/2015/04/msg00002… (mailing-list)
- www.ubuntu.com/usn/USN-2567-1 (vendor-advisory)
- www.kb.cert.org/vuls/id/374268 (US Government Resource, Third Party Advisory, third-party-advisory)
- www.securityfocus.com/bid/73950 (vdb-entry)
- marc.info/ (vendor-advisory)
- lists.fedoraproject.org/pipermail/package-announce/2015-April/155864.html (vendor-advisory)
- support.ntp.org/bin/view/Main/SecurityNotice (Vendor Advisory)
- kc.mcafee.com/corporate/index
Frequently asked questions
- What is CVE-2015-1799?
- CVE-2015-1799 is a vulnerability in NTP, classified under CWE-17. Published 2015-04-08.
- Is CVE-2015-1799 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.