CVE-2012-4623 Denial of service in n/a
Remote attackers can cause a device reload via malformed DHCPv6 packets, impacting network availability on Cisco IOS devices.
- 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-2012-4623?
CVE-2012-4623 is a high-severity denial of service vulnerability in Cisco Ios, published on 27 Sep 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The DHCPv6 server in Cisco IOS 12.2 through 12.4 and 15.0 through 15.2 and IOS XE 2.1.x through 2.6.x, 3.1.xS before 3.1.4S, 3.1.xSG and 3.2.xSG before 3.2.5SG, 3.2.xS, 3.2.xXO, 3.3.xS, and 3.3.xSG before 3.3.1SG allows remote attackers to cause a denial of service (device reload) via a malformed DHCPv6 packet, aka Bug ID CSCto57723.
Weakness: CWE-20
Which versions are affected by CVE-2012-4623?
It affects 2 products.
Products include Cisco Ios, Cisco Ios Xe.
How do I fix CVE-2012-4623?
No fix has been published for CVE-2012-4623 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-2012-4623 being exploited?
There is no known exploitation of CVE-2012-4623 in the wild and no public exploit code.
Other vulnerabilities in Cisco Ios
- CVE-2017-12240 Cisco IOS and IOS XE Software DHCP Remote Code Execution
- CVE-2017-3881 Cisco IOS and IOS XE Remote Code Execution
- CVE-2018-0167 Cisco IOS, XR, and XE Software Buffer Overflow
- CVE-2017-6736 Cisco IOS and IOS XE Software SNMP Remote Code Execution
- CVE-2017-6737 Cisco IOS and IOS XE Software SNMP Remote Code Execution
Sources
Also known as GHSA-j797-37x4-fmcf.