ntpd 4.2.8 KoD Packet input validation

CVSS Meta Temp Score
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CTI Interest Score
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8.1$0-$5k0.00

Summaryinfo

A vulnerability was found in ntpd 4.2.8. It has been rated as problematic. The impacted element is an unknown function of the component KoD Packet Handler. Performing a manipulation results in input validation. This vulnerability is known as CVE-2015-7705. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in ntpd 4.2.8 (Network Management Software). It has been classified as critical. This affects an unknown function of the component KoD Packet Handler. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on availability. The summary by CVE is:

The rate limiting feature in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to have unspecified impact via a large number of crafted requests.

The weakness was published 10/21/2015 as cisco-sa-20151021-ntp as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. This vulnerability is uniquely identified as CVE-2015-7705 since 10/04/2015. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 96928 (Citrix XenServer Multiple Vulnerabilities (CTX220112)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc.. The commercial vulnerability scanner Qualys is able to test this issue with plugin 38684 (Network Time Protocol Multiple Security Vulnerabilities (ntp-4.2.8p4)).

Upgrading to version 4.2.8p4 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (107447), Tenable (96928), SecurityFocus (BID 77284†) and Vulnerability Center (SBV-53942†). Further details are available at cs.bu.edu. Similar entries are available at VDB-78844, VDB-78845, VDB-78846 and VDB-78847. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.6
VulDB Meta Temp Score: 8.1

VulDB Base Score: 7.5
VulDB Temp Score: 6.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 96928
Nessus Name: Citrix XenServer Multiple Vulnerabilities (CTX220112)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 800407
OpenVAS Name: NTP.org ntpd Multiple Vulnerabilities
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: ntpd 4.2.8p4

Timelineinfo

10/04/2015 🔍
10/21/2015 +17 days 🔍
10/21/2015 +0 days 🔍
10/21/2015 +0 days 🔍
10/23/2015 +2 days 🔍
10/23/2015 +0 days 🔍
08/07/2017 +654 days 🔍
06/25/2022 +1782 days 🔍

Sourcesinfo

Advisory: cisco-sa-20151021-ntp
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-7705 (🔍)
GCVE (CVE): GCVE-0-2015-7705
GCVE (VulDB): GCVE-100-78855
X-Force: 107447 - Network Time Protocol KoD packets denial of service
SecurityFocus: 77284
SecurityTracker: 1033951
Vulnerability Center: 53942 - NTP before 4.2.8p4 Remote DoS and Unspecified Other Impact via Kiss-of-Death (KoD) Packet - CVE-2015-7705, High

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 10/23/2015 10:06
Updated: 06/25/2022 01:21
Changes: 10/23/2015 10:06 (84), 02/20/2018 10:22 (1), 06/25/2022 01:13 (4), 06/25/2022 01:21 (1)
Complete: 🔍
Cache ID: 216:9DB:103

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