CVE-2010-4164: Integer Underflow
Description of problem: On parsing malformed X.25 facilities, decrementing the remaining length may cause it to underflow. Since the length is an unsigned integer, this will result in the loop continuing until the kernel crashes.
This patch adds checks to ensure decrementing the remaining length does not cause it to wrap around.
http://marc.info/?l=linux-netdev&m=128951543005554&w=2
Acknowledgements:
Red Hat would like to thank Dan Rosenberg for reporting this issue.
Statement:
This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 4, 5, 6 and Red Hat Enterprise MRG as they did not include support for CCITT X.25 Packet Layer.
Other sources
Multiple integer underflows in the x25parsefacilities function in ne ...
— Debian
Affected Software
Remediation
Patch Available
Patch Available
Event History
Frequently Asked Questions
What is the severity of CVE-2010-4164?
CVE-2010-4164 is categorized as a medium severity vulnerability due to the potential for kernel crashes.
How do I fix CVE-2010-4164?
To fix CVE-2010-4164, apply the appropriate security patches for your affected Linux kernel version.
What systems are affected by CVE-2010-4164?
CVE-2010-4164 affects various versions of the Linux kernel, including specific versions of Debian and openSUSE.
What is the nature of the vulnerability in CVE-2010-4164?
CVE-2010-4164 involves a denial of service vulnerability caused by underflow when parsing malformed X.25 facilities.
Can CVE-2010-4164 be exploited remotely?
Yes, CVE-2010-4164 can potentially be exploited remotely if a malicious user can send malformed X.25 packets.