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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5.5$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in ntpd 4.2.8. Affected by this vulnerability is an unknown functionality of the file ntp_crypto.c of the component autokey. This manipulation causes input validation. The identification of this vulnerability is CVE-2015-7702. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in ntpd 4.2.8 (Network Management Software). Affected by this vulnerability is an unknown code of the file ntp_crypto.c of the component autokey. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. The summary by CVE is:

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 shared 10/21/2015 with Tenable as cisco-sa-20151021-ntp as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. This vulnerability is known as CVE-2015-7702 since 10/04/2015. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability 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 (107451), Tenable (88055), SecurityFocus (BID 77286†) and Vulnerability Center (SBV-53939†). Additional details are provided at bugzilla.redhat.com. The entries VDB-78844, VDB-78845, VDB-78846 and VDB-78847 are related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.5

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

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

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: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: ntpd 4.2.8p4
McAfee IPS: 🔍
McAfee IPS Version: 🔍

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-2015-7702 (🔍)
GCVE (CVE): GCVE-0-2015-7702
GCVE (VulDB): GCVE-100-78859

OVAL: 🔍

X-Force: 107451 - Network Time Protocol autokey denial of service
SecurityFocus: 77286 - NTP CVE-2015-7702 Incomplete Fix Denial of Service Vulnerability
SecurityTracker: 1033951
Vulnerability Center: 53939 - NTP before 4.2.8p4 Remote DoS Vulnerability in ntp_crypto.c - CVE-2015-7702, Medium

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 10/23/2015 10:06
Updated: 06/25/2022 02:20
Changes: 10/23/2015 10:06 (87), 02/19/2018 10:03 (6), 06/25/2022 02:13 (4), 06/25/2022 02:20 (1)
Complete: 🔍
Cache ID: 216:031:103

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