Cisco ASA DNS resource management

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.00

A vulnerability, which was classified as critical, was found in Cisco ASA (Firewall Software). This affects some unknown processing of the component DNS. 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 integrity, and availability. The summary by CVE is:

A vulnerability in the DNS code of Cisco ASA Software could allow an unauthenticated, remote attacker to cause an affected device to reload or corrupt the information present in the device's local DNS cache. The vulnerability is due to a flaw in handling crafted DNS response messages. An attacker could exploit this vulnerability by triggering a DNS request from the Cisco ASA Software and replying with a crafted response. A successful exploit could cause the device to reload, resulting in a denial of service (DoS) condition or corruption of the local DNS cache information. Note: Only traffic directed to the affected device can be used to exploit this vulnerability. This vulnerability affects Cisco ASA Software configured in routed or transparent firewall mode and single or multiple context mode. This vulnerability can be triggered by IPv4 and IPv6 traffic. This vulnerability affects Cisco ASA Software running on the following products: Cisco ASA 1000V Cloud Firewall, Cisco ASA 5500 Series Adaptive Security Appliances, Cisco ASA 5500-X Series Next-Generation Firewalls, Cisco ASA Services Module for Cisco Catalyst 6500 Series Switches and Cisco 7600 Series Routers, Cisco Adaptive Security Virtual Appliance (ASAv), Cisco Firepower 9300 ASA Security Module, Cisco ISA 3000 Industrial Security Appliance. Fixed versions: 9.1(7.12) 9.2(4.18) 9.4(3.12) 9.5(3.2) 9.6(2.2). Cisco Bug IDs: CSCvb40898.

The bug was discovered 04/19/2017. The weakness was disclosed 04/20/2017 as cisco-sa-20170419-asa-dns as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. This vulnerability is uniquely identified as CVE-2017-6607 since 03/09/2017. 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 99665 (Cisco ASA Software DNS Response Message Handling DoS (cisco-sa-20170419-asa-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 316109 (Cisco ASA Software DNS Denial of Service Vulnerability (cisco-sa-20170419-asa-dns)).

Upgrading to version 9.1(7.12), 9.2(4.18), 9.4(3.12), 9.5(3.2) or 9.6(2.2) eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (99665) and SecurityFocus (BID 97933†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.7
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

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

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 99665
Nessus Name: Cisco ASA Software DNS Response Message Handling DoS (cisco-sa-20170419-asa-dns)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 800316
OpenVAS Name: Cisco ASA Software DNS Denial of Service Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: ASA 9.1(7.12)/9.2(4.18)/9.4(3.12)/9.5(3.2)/9.6(2.2)

Timelineinfo

03/09/2017 🔍
04/19/2017 +41 days 🔍
04/19/2017 +0 days 🔍
04/19/2017 +0 days 🔍
04/20/2017 +1 days 🔍
04/20/2017 +0 days 🔍
04/21/2017 +1 days 🔍
04/25/2017 +4 days 🔍
08/25/2024 +2679 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20170419-asa-dns
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-6607 (🔍)
GCVE (CVE): GCVE-0-2017-6607
GCVE (VulDB): GCVE-100-100407
SecurityFocus: 97933 - Cisco Adaptive Security Appliance (ASA) Software CVE-2017-6607 Denial of Service Vulnerability
OSVDB: - CVE-2017-6607 - Cisco - ASA - Denial of Service Issue
SecurityTracker: 1038319

Entryinfo

Created: 04/21/2017 10:13 AM
Updated: 08/25/2024 08:24 AM
Changes: 04/21/2017 10:13 AM (80), 12/21/2020 10:48 AM (3), 08/25/2024 08:24 AM (17)
Complete: 🔍
Cache ID: 18:BF3:40

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