Debian Security Advisory

DSA-336-1 linux-kernel-2.2.20 -- several vulnerabilities

Date Reported:
29 Jun 2003
Affected Packages:
kernel-source-2.2.20, kernel-image-2.2.20-i386
Security database references:
In the Bugtraq database (at SecurityFocus): BugTraq ID 6420, BugTraq ID 4259, BugTraq ID 6535, BugTraq ID 7112, BugTraq ID 7600, BugTraq ID 7601, BugTraq ID 7791, BugTraq ID 7793, BugTraq ID 7797.
In Mitre's CVE dictionary: CVE-2002-1380, CVE-2002-0429, CVE-2003-0001, CVE-2003-0127, CVE-2003-0364, CVE-2003-0246, CVE-2003-0244, CVE-2003-0247, CVE-2003-0248.
More information:

A number of vulnerabilities have been discovered in the Linux kernel.

  • CAN-2002-1380: Linux kernel 2.2.x allows local users to cause a denial of service (crash) by using the mmap() function with a PROT_READ parameter to access non-readable memory pages through the /proc/pid/mem interface.
  • CVE-2002-0429: The iBCS routines in arch/i386/kernel/traps.c for Linux kernels 2.4.18 and earlier on x86 systems allow local users to kill arbitrary processes via a binary compatibility interface (lcall)
  • CAN-2003-0001: Multiple ethernet Network Interface Card (NIC) device drivers do not pad frames with null bytes, which allows remote attackers to obtain information from previous packets or kernel memory by using malformed packets
  • CAN-2003-0127: The kernel module loader allows local users to gain root privileges by using ptrace to attach to a child process that is spawned by the kernel
  • CAN-2003-0244: The route cache implementation in Linux 2.4, and the Netfilter IP conntrack module, allows 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
  • CAN-2003-0246: The ioperm system call in Linux kernel 2.4.20 and earlier does not properly restrict privileges, which allows local users to gain read or write access to certain I/O ports.
  • CAN-2003-0247: vulnerability in the TTY layer of the Linux kernel 2.4 allows attackers to cause a denial of service ("kernel oops")
  • CAN-2003-0248: The mxcsr code in Linux kernel 2.4 allows attackers to modify CPU state registers via a malformed address.
  • CAN-2003-0364: The TCP/IP fragment reassembly handling in the Linux kernel 2.4 allows remote attackers to cause a denial of service (CPU consumption) via certain packets that cause a large number of hash table collisions

This advisory provides updated 2.2.20 kernel source, and binary kernel images for the i386 architecture. Other architectures and kernel versions will be covered by separate advisories.

For the stable distribution (woody) on the i386 architecture, these problems have been fixed in kernel-source-2.2.20 version 2.2.20-5woody2 and kernel-image-i386 version 2.2.20-5woody3.

For the unstable distribution (sid) these problems are fixed in kernel-source-2.2.25 and kernel-image-2.2.25-i386 version 2.2.25-2.

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.

NOTE: These kernels are not binary-compatible with the previous version. Any loadable modules will need to be recompiled in order to work with the new kernel.

Fixed in:

Debian GNU/Linux 3.0 (woody)

Architecture-independent component:
Intel IA-32:

MD5 checksums of the listed files are available in the original advisory.