SB2006072101 - Improper input validation in Linux kernel

Description

This security bulletin contains information about 1 security vulnerability.

1) Improper input validation (CVE-ID: CVE-2006-3468)

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

Linux kernel 2.6.x, when using both NFS and EXT3, allows remote attackers to cause a denial of service (file system panic) via a crafted UDP packet with a V2 lookup procedure that specifies a bad file handle (inode number), which triggers an error and causes an exported directory to be remounted read-only.

Remediation

Install update from vendor's website.

References

• http://lkml.org/lkml/2006/7/17/41
• http://secunia.com/advisories/21369
• http://secunia.com/advisories/21605
• http://secunia.com/advisories/21614
• http://secunia.com/advisories/21847
• http://secunia.com/advisories/21934
• http://secunia.com/advisories/22093
• http://secunia.com/advisories/22148
• http://secunia.com/advisories/22174
• http://secunia.com/advisories/22822
• http://support.avaya.com/elmodocs2/security/ASA-2006-203.htm
• http://www.debian.org/security/2006/dsa-1184
• http://www.mandriva.com/security/advisories?name=MDKSA-2006:150
• http://www.mandriva.com/security/advisories?name=MDKSA-2006:151
• http://www.novell.com/linux/security/advisories/2006_21_sr.html
• http://www.novell.com/linux/security/advisories/2006_22_sr.html
• http://www.novell.com/linux/security/advisories/2006_57_kernel.html
• http://www.novell.com/linux/security/advisories/2006_64_kernel.html
• http://www.redhat.com/support/errata/RHSA-2006-0617.html
• http://www.securityfocus.com/bid/19396
• http://www.trustix.org/errata/2006/0046/
• http://www.ubuntu.com/usn/usn-346-1
• https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=199172
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9809