Cisco ASA 5500 up to 8.6 DHCP resource management

CVSS Meta Temp Score
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Cisco ASA 5500 up to 8.6. Affected is an unknown function of the component DHCP Handler. Executing a manipulation can lead to resource management. This vulnerability is handled as CVE-2012-4643. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Cisco ASA 5500 up to 8.6 (Firewall Software). It has been declared as critical. This vulnerability affects an unknown code block of the component DHCP Handler. The manipulation with an unknown input leads to a resource management vulnerability. The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect availability. CVE summarizes:

The DHCP server on Cisco Adaptive Security Appliances (ASA) 5500 series devices, and the ASA Services Module (ASASM) in Cisco Catalyst 6500 series devices, with software 7.0 before 7.2(5.8), 7.1 before 7.2(5.8), 7.2 before 7.2(5.8), 8.0 before 8.0(5.28), 8.1 before 8.1(2.56), 8.2 before 8.2(5.27), 8.3 before 8.3(2.31), 8.4 before 8.4(3.10), 8.5 before 8.5(1.9), and 8.6 before 8.6(1.5) does not properly allocate memory for DHCP packets, which allows remote attackers to cause a denial of service (device reload) via a series of crafted IPv4 packets, aka Bug ID CSCtw84068.

The weakness was released 10/10/2012 with Cisco as cisco-sa-20121010-asa as confirmed advisory (Website). The advisory is shared for download at tools.cisco.com. The public release happened without coordination with the vendor. This vulnerability was named CVE-2012-4643 since 08/24/2012. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 62760 (Cisco ASA 5500 Series Multiple Vulnerabilities (cisco-sa-20121010-asa)), 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 43254 (Cisco ASA 5500 Series Adaptive Security Appliances and Cisco Catalyst 6500 Series ASA Services Module Multiple Vulnerabilities (cisco-sa-20121010-asa)).

Upgrading to version 8.6(1.5) eliminates this vulnerability. The upgrade is hosted for download at tools.cisco.com. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (79176), Tenable (62760), SecurityFocus (BID 55861†), OSVDB (86145†) and Secunia (SA50871†). Entries connected to this vulnerability are available at VDB-6668, VDB-6677, VDB-6675 and VDB-6674. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 7.5
VulDB Temp Score: 6.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
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: 62760
Nessus Name: Cisco ASA 5500 Series Multiple Vulnerabilities (cisco-sa-20121010-asa)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: ASA 5500 8.6(1.5)

Timelineinfo

08/24/2012 🔍
10/10/2012 +47 days 🔍
10/10/2012 +0 days 🔍
10/10/2012 +0 days 🔍
10/10/2012 +0 days 🔍
10/11/2012 +1 days 🔍
10/12/2012 +1 days 🔍
10/15/2012 +3 days 🔍
10/29/2012 +14 days 🔍
10/30/2012 +1 days 🔍
04/26/2019 +2369 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20121010-asa
Organization: Cisco
Status: Confirmed

CVE: CVE-2012-4643 (🔍)
GCVE (CVE): GCVE-0-2012-4643
GCVE (VulDB): GCVE-100-6676
X-Force: 79176 - Cisco ASA 5500 Series Adaptive Security Appliances DHCP denial of service, Medium Risk
SecurityFocus: 55861 - Cisco ASA 5500 Series and Cisco Catalyst 6500 Series DHCP Denial of Service Vulnerability
Secunia: 50871 - Cisco ASA Products Multiple Vulnerabilities, Moderately Critical
OSVDB: 86145
SecurityTracker: 1027641

See also: 🔍

Entryinfo

Created: 10/15/2012 14:36
Updated: 04/26/2019 21:16
Changes: 10/15/2012 14:36 (53), 04/26/2019 21:16 (33)
Complete: 🔍
Committer: olku
Cache ID: 216::103

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