high
7.8
CWE
20 682 119
Advisory Published
CVE Published
Updated

CVE-2009-4537: Input Validation

First published: Mon Dec 28 2009(Updated: )

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.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
redhat/kernel-rt<0:2.6.24.7-146.el5
0:2.6.24.7-146.el5
redhat/kernel<0:2.6.18-164.10.1.el5
0:2.6.18-164.10.1.el5
redhat/kernel<0:2.6.18-92.1.35.el5
0:2.6.18-92.1.35.el5
redhat/kernel<0:2.6.18-128.12.1.el5
0:2.6.18-128.12.1.el5
redhat/rhev-hypervisor<0:5.4-2.1.8.el5_4
0:5.4-2.1.8.el5_4
Linux Kernel<=2.6.32.3
Debian Linux=5.0

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Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2009-4537?

    CVE-2009-4537 has a severity rating that indicates it can lead to a denial of service due to improper handling of Ethernet frames.

  • How do I fix CVE-2009-4537?

    To fix CVE-2009-4537, update your kernel to versions above 2.6.32.3 or apply the specific patches available from your Linux distribution.

  • What systems are affected by CVE-2009-4537?

    CVE-2009-4537 affects Linux kernel versions 2.6.32.3 and earlier, impacting various distributions including Red Hat and Debian.

  • What type of attack does CVE-2009-4537 facilitate?

    CVE-2009-4537 facilitates denial of service attacks through crafted packets that exceed the maximum transmission unit (MTU).

  • Can CVE-2009-4537 be exploited remotely?

    Yes, CVE-2009-4537 can be exploited by remote attackers sending specially crafted Ethernet frames to the vulnerable system.

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