CVE-2015-7855
The decodenetnum function in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service (assertion failure) via a 6 or mode 7 packet containing a
02 Description
The decodenetnum function in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service (assertion failure) via a 6 or mode 7 packet containing a
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 31.06% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 98.1% of scored records. A rank, not a probability.
- NVD base score
- 6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Low. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2017-08-07 20:00Z9 YR AGO
- Last updated
- 2024-08-06 08:06Z2 YR AGO
- Reserved
- 2015-10-16
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-20Improper Input ValidationClass
- Data version
- 5.1
- Document digest
- ebc5bf0537f669799da02ca681ec64e74dbac835db6475197e046527e389603c
05 Affected products
06 References
- www.exploit-db.com40840https://www.exploit-db.com/exploits/40840/
- www.securityfocus.com77283http://www.securityfocus.com/bid/77283
- www.securitytracker.com1033951http://www.securitytracker.com/id/1033951
- www.debian.orgDSA-3388http://www.debian.org/security/2015/dsa-3388
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1274264
- h20566.www2.hpe.comhttps://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05270839
- support.ntp.orghttp://support.ntp.org/bin/view/Main/NtpBug2922
- security.gentoo.orgGLSA-201607-15https://security.gentoo.org/glsa/201607-15
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20171004-0001/
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf
- us-cert.cisa.govhttps://us-cert.cisa.gov/ics/advisories/icsa-21-103-11
07 Fixed in
Debian 11
- ntp Fixed in 1:4.2.8p4+dfsg-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- ntp Fixed in 1:4.2.6.p5+dfsg-3ubuntu2.14.04.5
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.