CVE-2015-7853 — Classic Buffer Overflow in NTP

CWE-120 — Classic Buffer OverflowCWE-119 — Improper Restriction of Operations within the Bounds of a Memory BufferCWE-20 — Improper Input ValidationCWE-22 — Path TraversalCWE-264CWE-287 — Improper AuthenticationCWE-39931 documents11 sources
Severity
9.8CRITICALNVD
OSV5.3
EPSS
35.0%
top 2.96%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
NTPDebian NTPCisco Products October 2015
Timeline
PublishedAug 7
Latest updateMay 13

Description

The datalen parameter in the refclock driver in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to execute arbitrary code or cause a denial of service (crash) via a negative input value.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages5 packages

▶NVDntp/ntp4.2.0 — 4.2.8+2
▶debiandebian/ntp< ntp 1:4.2.8p4+dfsg-1 (bullseye)
▶Debianntp/ntp< 1:4.2.8p4+dfsg-1
▶Ubuntuntp/ntp< 1:4.2.6.p5+dfsg-3ubuntu2.14.04.5

Patches

Patch: support.ntp.org ↗Patch: support.ntp.org ↗

🔴Vulnerability Details

3
GHSA
GHSA-m46c-h6cr-xhm7: The datalen parameter in the refclock driver in NTP 4↗2022-05-13
▶
OSV
CVE-2015-7853: The datalen parameter in the refclock driver in NTP 4↗2017-08-07
▶
OSV
ntp vulnerabilities↗2015-10-27
▶

📋Vendor Advisories

23
CISA ICS
Siemens SIMATIC NET CP 443-1 OPC UA↗2021-06-08
▶
CISA ICS
Rockwell Automation Stratix 5900↗2017-05-10
▶
Ubuntu
NTP vulnerabilities↗2015-10-27
▶
BSD
FreeBSD-SA-15:25.ntp: Multiple vulnerabilities of ntp [REVISED]↗2015-10-26
▶
Cisco
Multiple Vulnerabilities in ntpd Affecting Cisco Products - October 2015↗2015-10-22
▶

🕵️Threat Intelligence

2
Talos
Cisco Identifies Multiple Vulnerabilities in Network Time Protocol daemon (ntpd)↗2015-10-21
▶
Talos
Cisco Identifies Multiple Vulnerabilities in Network Time Protocol daemon (ntpd)↗2015-10-21
▶

💬Community

2
Bugzilla
CVE-2015-7853 ntp: reference clock memory corruption vulnerability [fedora-all]↗2016-01-06
▶
Bugzilla
CVE-2015-7853 ntp: reference clock memory corruption vulnerability↗2015-10-22
▶