CVE-2012-3571 Denial of service in n/a
Remote attackers can cause a denial of service via infinite loop and CPU consumption by sending a malformed client identifier to ISC DHCP.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2012-3571?
CVE-2012-3571 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 25 Jul 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
ISC DHCP 4.1.2 through 4.2.4 and 4.1-ESV before 4.1-ESV-R6 allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a malformed client identifier.
Weakness: CWE-119
Which versions are affected by CVE-2012-3571?
It affects 3 products.
Linux distribution packages (14)
dhclient Red Hat:enterprise_linux:5::client | All versions | 12:3.0.5-31.el5_8.1 |
dhcp Red Hat:enterprise_linux:5::client | All versions | 12:3.0.5-31.el5_8.1 |
dhcp-debuginfo Red Hat:enterprise_linux:5::client | All versions | 12:3.0.5-31.el5_8.1 |
libdhcp4client Red Hat:enterprise_linux:5::client | All versions | 12:3.0.5-31.el5_8.1 |
dhcp Red Hat:enterprise_linux:5::client_workstation | All versions | 12:3.0.5-31.el5_8.1 |
dhcp-debuginfo Red Hat:enterprise_linux:5::client_workstation | All versions | 12:3.0.5-31.el5_8.1 |
dhcp-devel Red Hat:enterprise_linux:5::client_workstation | All versions | 12:3.0.5-31.el5_8.1 |
libdhcp4client-devel Red Hat:enterprise_linux:5::client_workstation | All versions | 12:3.0.5-31.el5_8.1 |
dhclient Red Hat:enterprise_linux:5::server | All versions | 12:3.0.5-31.el5_8.1 |
dhcp Red Hat:enterprise_linux:5::server | All versions | 12:3.0.5-31.el5_8.1 |
dhcp-debuginfo Red Hat:enterprise_linux:5::server | All versions | 12:3.0.5-31.el5_8.1 |
dhcp-devel Red Hat:enterprise_linux:5::server | All versions | 12:3.0.5-31.el5_8.1 |
libdhcp4client Red Hat:enterprise_linux:5::server | All versions | 12:3.0.5-31.el5_8.1 |
libdhcp4client-devel Red Hat:enterprise_linux:5::server | All versions | 12:3.0.5-31.el5_8.1 |
Products include Canonical Ubuntu Linux, Debian Debian Linux, Isc Dhcp.
How do I fix CVE-2012-3571?
Upgrade to a fixed version.
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-2012-3571 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2012-3571 exists.
Public exploit code: 1 Exploit-DB entry.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as DEBIAN-CVE-2012-3571, GHSA-2fx4-27pj-8f74, RHSA-2012:1140.