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Vulnerability record · CVE-2012-4643 · published 29 October 2012

CVE-2012-4643: Cisco adaptive security appliance software vulnerability

Cisco · Adaptive Security Appliance Software

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.

7.1 CVSS 2.0 High EPSS 1.5% · top 26.3% CWE-399 · CWE-399
7.1CVSS 2.0 base score
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
11Affected product versions listed by NVD
6References
16 Jun 2026Last modified by NVD

Description

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.

AV:N/AC:M/Au:N/C:N/I:N/A:C

Affected products

11 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://osvdb.org/86145
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20121010-asa Vendor Advisory
http://www.securityfocus.com/bid/55861
http://osvdb.org/86145
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20121010-asa Vendor Advisory
http://www.securityfocus.com/bid/55861

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2012-4643), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.