CVE-2009-4537 Denial of service in n/a
Remote attackers can cause denial of service via crafted Ethernet packets due to improper size checking in the r8169 network driver.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2009-4537?
CVE-2009-4537 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 12 Jan 2010. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
drivers/net/r8169.c in the r8169 driver in the Linux kernel 2.6.32.3 and earlier does not properly check the size of an Ethernet frame that exceeds the MTU, which allows remote attackers to (1) cause a denial of service (temporary network outage) via a packet with a crafted size, in conjunction with certain packets containing A characters and certain packets containing E characters; or (2) cause a denial of service (system crash) via a packet with a crafted size, in conjunction with certain packets containing '\0' characters, related to the value of the status register and erroneous behavior associated with the RxMaxSize register. NOTE: this vulnerability exists because of an incorrect fix for CVE-2009-1389.
Weakness: CWE-20
Which versions are affected by CVE-2009-4537?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2009-4537?
Apply the vendor's patch.
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-2009-4537 being exploited?
There is no known exploitation of CVE-2009-4537 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as GHSA-pvpv-c389-c5f8.