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Servers and applications

CVE-2012-4643

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…

Severity
High 7.1
Published
29 Oct 2012
Last changed
16 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
1.5% in the next 30 daysHigher than 75% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
CWE-399
Attack
Over the network · No login needed
Attacker can
Take it down
CVSS vector
AV:N/AC:M/Au:N/C:N/I:N/A:C
Sources
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.

From NVD.

Affected software

SoftwareAffected versions
Cisco ASA and Firepower Threat DefenseServers and applications · cpe:o:cisco:adaptive_security_appliance_software
  • Version 8.6(1)
  • Version 8.6
  • Version 8.5(1.4)
  • Version 8.5(1)
All 59 release lines
  • Version 7.0
  • Version 7.0(0)
  • Version 7.0(1)
  • Version 7.0(2)
  • Version 7.0(4)
  • Version 7.0(5)
  • Version 7.0(5.2)
  • Version 7.1
  • Version 7.1(2)
  • Version 7.1(2.5)
  • Version 7.1(2.27)
  • Version 7.1(2.48)
  • Version 7.1(2.49)
  • Version 7.1(5)
  • Version 7.2
  • Version 7.2(1)
  • Version 7.2(1.22)
  • Version 7.2(2)
  • Version 7.2(2.5)
  • Version 7.2(2.7)
  • Version 7.2(2.8)
  • Version 7.2(2.10)
  • Version 7.2(2.14)
  • Version 7.2(2.15)
  • Version 7.2(2.16)
  • Version 7.2(2.17)
  • Version 7.2(2.18)
  • Version 7.2(2.19)
  • Version 7.2(2.48)
  • Version 7.2(3)
  • Version 7.2(4)
  • Version 7.2(5)
  • Version 8.0
  • Version 8.0(2)
  • Version 8.0(3)
  • Version 8.0(4)
  • Version 8.0(5)
  • Version 8.1
  • Version 8.2
  • Version 8.2(1)
  • Version 8.2(2)
  • Version 8.2(3)
  • Version 8.2(3.9)
  • Version 8.2(4)
  • Version 8.2(4.1)
  • Version 8.2(4.4)
  • Version 8.2(5)
  • Version 8.3(1)
  • Version 8.3(2)
  • Version 8.4
  • Version 8.4(1)
  • Version 8.4(1.11)
  • Version 8.4(2)
  • Version 8.4(2.11)
  • Version 8.5
  • Version 8.5(1)
  • Version 8.5(1.4)
  • Version 8.6
  • Version 8.6(1)

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2012-4643
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2012-4643