CVE-2011-4012 Denial of service in n/a
Remote attackers can cause a denial of service on Cisco IOS devices using PFC3C by exploiting ICMPv6 ACL fragment entry handling.
- 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-2011-4012?
CVE-2011-4012 is a critical denial of service vulnerability in Cisco Ios, published on 2 May 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Cisco IOS 12.0, 15.0, and 15.1, when a Policy Feature Card 3C (PFC3C) is used, does not create a fragment entry during processing of an ICMPv6 ACL, which has unspecified impact and remote attack vectors, aka Bug ID CSCtj90091.
Which versions are affected by CVE-2011-4012?
It affects 1 product.
Products include Cisco Ios.
How do I fix CVE-2011-4012?
No fix has been published for CVE-2011-4012 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-2011-4012 being exploited?
There is no known exploitation of CVE-2011-4012 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-rcm6-ccwh-xh5v.