Cisco Catalyst 6500 up to 8.6 DHCP resource management

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6.5$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Cisco Catalyst 6500 up to 8.6. Affected by this vulnerability is an unknown functionality of the component DHCP Handler. The manipulation leads to resource management. This vulnerability is uniquely identified as CVE-2012-4643. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco Catalyst 6500 up to 8.6. It has been rated as critical. This issue affects some unknown processing of the component DHCP Handler. The manipulation with an unknown input leads to a resource management vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is availability. The summary by CVE is:

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 disclosed 10/10/2012 with Cisco as cisco-sa-20121010-asa as confirmed advisory (Website). The advisory is shared at tools.cisco.com. The public release happened without involvement of Cisco. The identification of this vulnerability is CVE-2012-4643 since 08/24/2012. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are 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. 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†). The entries VDB-6668, VDB-6676, VDB-6675 and VDB-6674 are pretty similar. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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: 🔍
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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: 🔍
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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Catalyst 6500 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 🔍
10/10/2012 +0 days 🔍
10/11/2012 +1 days 🔍
10/11/2012 +0 days 🔍
10/15/2012 +4 days 🔍
10/29/2012 +14 days 🔍
10/30/2012 +1 days 🔍
04/18/2021 +3092 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-100-6677
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 - Cisco ASA Bugs Let Remote Users Deny Service and Execute Arbitrary Code
Vulnerability Center: 36467 - [cisco-sa-20121010-asa] DHCP Implementation in Cisco ASA Products Remote DoS Vulnerability, High

See also: 🔍

Entryinfo

Created: 10/15/2012 14:36
Updated: 04/18/2021 10:22
Changes: 10/15/2012 14:36 (83), 04/18/2017 08:58 (6), 04/18/2021 10:22 (3)
Complete: 🔍
Cache ID: 216:40B:103

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