BusyBox NTP Packet networking/ntpd.c recv_and_process_client_pkt resource management

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.4$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in BusyBox. This impacts the function recv_and_process_client_pkt of the file networking/ntpd.c of the component NTP Packet Handler. Performing a manipulation results in resource management. This vulnerability was named CVE-2016-6301. The attack may be initiated remotely. There is no available exploit. It is suggested to use restrictive firewalling.

Detailsinfo

A vulnerability was found in BusyBox (the affected version is unknown). It has been classified as critical. This affects the function recv_and_process_client_pkt of the file networking/ntpd.c of the component NTP Packet Handler. The manipulation with an unknown input leads to a resource management vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on availability. The summary by CVE is:

The 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.

The bug was discovered 12/22/2016. The weakness was presented 12/09/2016 by Miroslav Lichvar (Website). The advisory is shared at openwall.com. This vulnerability is uniquely identified as CVE-2016-6301 since 07/26/2016. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 96236 (GLSA-201701-05 : BusyBox: Denial of Service), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks and running in the context l.

It is possible to mitigate the weakness by firewalling udp/123 (ntp). A possible mitigation has been published 4 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (96236) and SecurityFocus (BID 92277†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 96236
Nessus Name: GLSA-201701-05 : BusyBox: Denial of Service
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Firewall
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: git.busybox.net
Firewalling: 🔍

Timelineinfo

07/26/2016 🔍
08/03/2016 +8 days 🔍
12/09/2016 +128 days 🔍
12/09/2016 +0 days 🔍
12/10/2016 +1 days 🔍
12/22/2016 +12 days 🔍
01/01/2017 +10 days 🔍
01/03/2017 +2 days 🔍
12/04/2025 +3257 days 🔍

Sourcesinfo

Advisory: 153278
Researcher: Miroslav Lichvar
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-6301 (🔍)
GCVE (CVE): GCVE-0-2016-6301
GCVE (VulDB): GCVE-100-93993
SecurityFocus: 92277 - BusyBox 'networking/ntpd.c' Remote Denial of Service Vulnerability

Entryinfo

Created: 12/10/2016 13:38
Updated: 12/04/2025 18:25
Changes: 12/10/2016 13:38 (59), 06/22/2019 17:12 (15), 10/05/2022 09:28 (4), 12/04/2025 18:25 (20)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you know our Splunk app?

Download it now for free!