CVE-2016-6301

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Summary

CVECVE-2016-6301
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2016-12-09 20:59:01 UTC
Updated2026-05-06 22:30:45 UTC
DescriptionThe recv_and_process_client_pkt function in networking/ntpd.c in busybox allows remote attackers to cause a denial of service (CPU and bandwidth consumption) via a forged NTP packet, which triggers a communication loop.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.032770000 probability, percentile 0.872630000 (date 2026-05-10)

Problem Types: CWE-399 | CWE-835 | n/a | CWE-835 CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.0[email protected]Primary7.5HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
2.0[email protected]Primary7.8AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete

AV:N/AC:L/Au:N/C:N/I:N/A:C

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Busybox Busybox All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
Full Disclosure: SEC Consult SA-20190904-0 :: Multiple vulnerabilities in Cisco router series RV34X, RV26X and RV16X af854a3a-2127-422b-91ae-364da2661108 seclists.org
Cisco Device Hardcoded Credentials / GNU glibc / BusyBox ≈ Packet Storm af854a3a-2127-422b-91ae-364da2661108 packetstormsecurity.com
Full Disclosure: SEC Consult SA-20190612-0 :: Multiple vulnerabilities in WAGO 852 Industrial Managed Switch Series af854a3a-2127-422b-91ae-364da2661108 seclists.org
BusyBox: Denial of Service (GLSA 201701-05) — Gentoo security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org Third Party Advisory
Full Disclosure: SEC Consult SA-20200827-0 :: Multiple Vulnerabilities in ZTE mobile Hotspot MS910S af854a3a-2127-422b-91ae-364da2661108 seclists.org
busybox - BusyBox: The Swiss Army Knife of Embedded Linux af854a3a-2127-422b-91ae-364da2661108 git.busybox.net Issue Tracking, Patch
Bugtraq: SEC Consult SA-20190904-0 :: Multiple vulnerabilities in Cisco router series RV34X, RV26X and RV16X af854a3a-2127-422b-91ae-364da2661108 seclists.org
oss-security - CVE-2016-6301: busybox: NTP server denial of service flaw af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List, Third Party Advisory
Full Disclosure: SEC Consult SA-20200312-0 :: Authenticated Command Injection in Phoenix Contact TC Router & TC Cloud Client af854a3a-2127-422b-91ae-364da2661108 seclists.org
Bugtraq: SEC Consult SA-20190612-0 :: Multiple vulnerabilities in WAGO 852 Industrial Managed Switch Series af854a3a-2127-422b-91ae-364da2661108 seclists.org
Bug 1363710 – CVE-2016-6301 busybox: NTP server denial of service flaw af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking, Third Party Advisory
WAGO 852 Industrial Managed Switch Series Code Execution / Hardcoded Credentials ≈ Packet Storm af854a3a-2127-422b-91ae-364da2661108 packetstormsecurity.com
BusyBox 'networking/ntpd.c' Remote Denial of Service Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com Third Party Advisory, VDB Entry
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 590948 Advantech Spectre RT Industrial Routers Multiple Vulnerabilities (ICSA-21-054-03)
  • 710364 Gentoo Linux BusyBox Denial of Service (DoS) Vulnerability (GLSA 201701-05)
  • 751624 SUSE Enterprise Linux Security Update for busybox (SUSE-SU-2022:0135-1)
  • 751633 OpenSUSE Security Update for busybox (openSUSE-SU-2022:0135-1)
  • 752794 SUSE Enterprise Linux Security Update for busybox (SUSE-SU-2022:3959-1)
  • 752903 SUSE Enterprise Linux Security Update for busybox (SUSE-SU-2022:4253-1)
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