Cisco IOS/IOS XE DNS Forwarder DNS Reply input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.9$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Cisco IOS and IOS XE. This vulnerability affects unknown code of the component DNS Forwarder. Such manipulation as part of DNS Reply leads to input validation. This vulnerability is uniquely identified as CVE-2016-6380. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco IOS and IOS XE (Router Operating System) (affected version unknown) and classified as critical. Affected by this issue is an unknown functionality of the component DNS Forwarder. The manipulation as part of a DNS Reply leads to a input validation vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability.

The weakness was disclosed 09/28/2016 with Cisco as cisco-sa-20160928-dns as confirmed advisory (Website). The advisory is available at tools.cisco.com. This vulnerability is handled as CVE-2016-6380 since 07/26/2016. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 09/21/2022).

The vulnerability scanner Nessus provides a plugin with the ID 108957 (Cisco IOS XE Software DNS Forwarder Denial of Service Vulnerability (cisco-sa-20160928-dns)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316034 (Cisco IOS Software DNS Forwarder Denial of Service Vulnerability (cisco-sa-20160928-dns)).

Upgrading 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 Tenable (108957), SecurityFocus (BID 93201†) and SecurityTracker (ID 1036914†). tools.cisco.com is providing further details. The entries VDB-92251, VDB-92252, VDB-92253 and VDB-92254 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.1
VulDB Meta Temp Score: 7.9

VulDB Base Score: 8.1
VulDB Temp Score: 7.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.1
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 108957
Nessus Name: Cisco IOS XE Software DNS Forwarder Denial of Service Vulnerability (cisco-sa-20160928-dns)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 103403
OpenVAS Name: Cisco IOS XE Software DNS Forwarder Denial of Service Vulnerability
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: 🔍

Timelineinfo

07/26/2016 🔍
09/28/2016 +64 days 🔍
09/28/2016 +0 days 🔍
09/28/2016 +0 days 🔍
09/28/2016 +0 days 🔍
10/03/2016 +5 days 🔍
10/05/2016 +2 days 🔍
04/10/2018 +552 days 🔍
09/21/2022 +1625 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20160928-dns
Organization: Cisco
Status: Confirmed

CVE: CVE-2016-6380 (🔍)
GCVE (CVE): GCVE-0-2016-6380
GCVE (VulDB): GCVE-100-92282

OVAL: 🔍

SecurityFocus: 93201 - Cisco IOS and IOS XE Software CVE-2016-6380 Denial of Service Vulnerability
SecurityTracker: 1036914

scip Labs: https://www.scip.ch/en/?labs.20150108
Misc.: 🔍
See also: 🔍

Entryinfo

Created: 10/03/2016 09:55
Updated: 09/21/2022 15:25
Changes: 10/03/2016 09:55 (75), 04/29/2019 11:02 (11), 09/21/2022 15:25 (4)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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