Vulnerability in NTP
CVE-2015-1798
The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC.
Published · last modified .
CVSS v2 metric
CVSS v2 base score 1.8 (Low). Vector: AV:A/AC:H/Au:N/C:N/I:P/A:N. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.022 (82.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 82.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.022 · newest: 0.022 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.securitytracker.com/id/1032032 (vdb-entry)
- 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)
- 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
- lists.fedoraproject.org/pipermail/package-announce/2015-April/155863.html (vendor-advisory)
- lists.apple.com/archives/security-announce/2015/Jun/msg00002.html (vendor-advisory)
- lists.opensuse.org/opensuse-updates/2015-04/msg00052.html (vendor-advisory)
Frequently asked questions
- What is CVE-2015-1798?
- CVE-2015-1798 is a vulnerability in NTP, classified under CWE-17. Published 2015-04-08.
- Is CVE-2015-1798 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.