CVE-2012-4643 Denial of service in n/a
Remote attackers can cause a denial of service and device reload on Cisco ASA devices by sending crafted IPv4 DHCP packets.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2012-4643?
CVE-2012-4643 is a high-severity denial of service vulnerability in Cisco 5500 Series Adaptive Security Appliance, published on 29 Oct 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-399
Which versions are affected by CVE-2012-4643?
It affects 11 products.
Products include Cisco 5500 Series Adaptive Security Appliance, Cisco Adaptive Security Appliance Software, Cisco Catalyst 6500, Cisco Catalyst 6503-E, Cisco Catalyst 6504-E, Cisco Catalyst 6506-E and 5 more.
How do I fix CVE-2012-4643?
No fix has been published for CVE-2012-4643 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2012-4643 being exploited?
There is no known exploitation of CVE-2012-4643 in the wild and no public exploit code.
Other vulnerabilities in Cisco 5500 Series Adaptive Security Appliance
- CVE-2012-0358 Memory corruption in n/a
- CVE-2012-4661 Memory corruption in n/a
- CVE-2010-4675 Auth bypass in n/a
- CVE-2010-4680 Security feature bypass in n/a
- CVE-2011-3298 Auth bypass in n/a
All Cisco 5500 Series Adaptive Security Appliance vulnerabilities
Sources
Also known as GHSA-q56j-8xm2-393w.