Cisco ASA DHCP Relay Interface resource management

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6.2	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Cisco ASA. It has been declared as problematic. Affected is an unknown function of the component DHCP Relay. Executing a manipulation can lead to resource management (Interface). This vulnerability is handled as CVE-2016-6424. The attack can only be done within the local network. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Cisco ASA (Firewall Software) (version now known). This vulnerability affects some unknown processing of the component DHCP Relay. The manipulation with an unknown input leads to a resource management vulnerability (Interface). The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect availability. CVE summarizes:

The DHCP Relay implementation in Cisco Adaptive Security Appliance (ASA) Software 8.4.7.29 and 9.1.7.4 allows remote attackers to cause a denial of service (interface wedge) via a crafted rate of DHCP packet transmission, aka Bug ID CSCuy66942.

The weakness was released 10/05/2016 as cisco-sa-20161005-asa-dhcp / CSCuy66942 as confirmed advisory (Website). The advisory is shared for download at tools.cisco.com. This vulnerability was named CVE-2016-6424 since 07/26/2016. The exploitation appears to be easy. Access to the local network is required for this attack to succeed. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

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 SecurityFocus (BID 93408†) and SecurityTracker (ID 1036961†). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Firewall Software

Vendor

• Cisco

Name

• ASA

License

• commercial

Website

• Vendor: https://www.cisco.com/

CPE 2.3info

• 🔍
• 🔍
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CPE 2.2info

• 🔍
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CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.3

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

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

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

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

07/26/2016 🔍
10/05/2016 +71 days 🔍
10/05/2016 +0 days 🔍
10/05/2016 +0 days 🔍
10/06/2016 +1 days 🔍
10/06/2016 +0 days 🔍
10/06/2016 +0 days 🔍
05/04/2019 +939 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20161005-asa-dhcp / CSCuy66942
Status: Confirmed

CVE: CVE-2016-6424 (🔍)
GCVE (CVE): GCVE-0-2016-6424
GCVE (VulDB): GCVE-100-92476

OVAL: 🔍

SecurityFocus: 93408 - Cisco ASA Software CVE-2016-6424 Denial of Service Vulnerability
SecurityTracker: 1036961

Entryinfo

Created: 10/06/2016 21:18
Updated: 05/04/2019 00:05
Changes: 10/06/2016 21:18 (63), 05/04/2019 00:05 (11)
Complete: 🔍
Cache ID: 216::103

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