ntpd 4.2.8 autokey ntp_crypto.c input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

A vulnerability classified as problematic has been found in ntpd 4.2.8 (Network Management Software). Affected is an unknown part of the file ntp_crypto.c of the component autokey. 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. CVE summarizes:

The crypto_xmit 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 (crash). NOTE: This vulnerability exists due to an incomplete fix for CVE-2014-9750.

The weakness was presented 10/21/2015 with Tenable as cisco-sa-20151021-ntp as confirmed advisory (Website). The advisory is available at tools.cisco.com. This vulnerability is traded as CVE-2015-7692 since 10/04/2015. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 88055 (AIX 6.1 TL 9 : ntp (IV79942) (deprecated)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family AIX Local Security Checks. 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 (107450) and Tenable (88055). Further details are available at bugzilla.redhat.com.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.0

VulDB Base Score: 5.3
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

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

Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
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Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 88055
Nessus Name: AIX 6.1 TL 9 : ntp (IV79942) (deprecated)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 14611
OpenVAS Name: Amazon Linux Local Check: alas-2015-607
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: ntpd 4.2.8p4
McAfee IPS: 🔍
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Timelineinfo

10/04/2015 🔍
10/21/2015 +17 days 🔍
10/21/2015 +0 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 +1783 days 🔍

Sourcesinfo

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

CVE: CVE-2015-7692 (🔍)
OVAL: 🔍

X-Force: 107450 - Network Time Protocol autokey denial of service
SecurityTracker: 1033951
Vulnerability Center: 53937 - NTP before 4.2.8p4 Remote DoS Vulnerability in ntp_crypto.c - CVE-2015-7692, Medium
SecurityFocus: 77285 - NTP CVE-2015-7692 Incomplete Fix Denial of Service Vulnerability

Misc.: 🔍

Entryinfo

Created: 10/23/2015 10:06
Updated: 06/25/2022 02:05
Changes: 10/23/2015 10:06 (87), 02/19/2018 09:35 (6), 06/25/2022 01:58 (4), 06/25/2022 02:05 (1)
Complete: 🔍
Cache ID: 3:1E7:103

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