Vulnerability Assessment & Network Security Forums
If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important. If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.
Vulnerability Assessment Details
Detailed Explanation for this Vulnerability Assessment
A number of vulnerabilities have been discovered in the Linux kernel.
CVE-2002-0429: The iBCS routines in arch/i386/kernel/traps.c for
Linux kernels 2.4.18 and earlier on x86 systems permit local users to
kill arbitrary processes via a binary compatibility interface
CVE-2003-0001: Multiple ethernet Network Interface Card (NIC) device
drivers do not pad frames with null bytes, which permits remote
attackers to obtain information from previous packets or kernel
memory by using malformed packets.
CVE-2003-0127: The kernel module loader permits local users to gain
root rights by using ptrace to attach to a child process that is
spawned by the kernel.
CVE-2003-0244: The route cache implementation in Linux 2.4, and the
Netfilter IP conntrack module, permits remote attackers to cause a
denial of service (CPU consumption) via packets with forged source
addresses that cause a large number of hash table collisions related
to the PREROUTING chain.
CVE-2003-0246: The ioperm system call in Linux kernel 2.4.20 and
earlier does not properly restrict rights, which permits local
users to gain read or write access to certain I/O ports.
CVE-2003-0247: Vulnerability in the TTY layer of the Linux kernel
2.4 permits attackers to cause a denial of service ("kernel oops").
CVE-2003-0248: The mxcsr code in Linux kernel 2.4 permits attackers
to modify CPU state registers via a malformed address.
CVE-2003-0364: The TCP/IP fragment reassembly handling in the Linux
kernel 2.4 permits remote attackers to cause a denial of service (CPU
consumption) via certain packets that cause a large number of hash
This advisory covers only the powerpc architecture. Other
architectures will be covered by separate advisories.
For the stable distribution (woody) on the powerpc architecture, these
problems have been fixed in version 2.4.18-1woody1.
For the unstable distribution (sid) these problems are fixed in
We recommend that you update your kernel packages.
NOTE: A system reboot will be required immediately after the upgrade
in order to replace the running kernel. Remember to read carefully
and follow the instructions given during the kernel upgrade process.
Solution : http://www.debian.org/security/2003/dsa-312
Network Security Threat Level: High
Networks Security ID: 6535, 7112, 7600, 7601, 7791, 7793, 7797
Vulnerability Assessment Copyright: This script is (C) 2005 Michel Arboi
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