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Mandrake Linux Advisory: kernel

Jul 25, 2003, 20:29 (0 Talkback[s])

Mandrake Linux Security Update Advisory

Package name: kernel
Advisory ID: MDKSA-2003:066-2
Date: July 25th, 2003
Original Advisory Date: June 11th, 2003
Affected versions: 9.1

Problem Description:

Multiple vulnerabilities were discovered and fixed in the Linux kernel.

  • CAN-2003-0001: Multiple ethernet network card drivers do not pad frames with null bytes which allows remote attackers to obtain information from previous packets or kernel memory by using special malformed packets.
  • CAN-2003-0244: The route cache implementation in the 2.4 kernel and the Netfilter IP conntrack module allows remote attackers to cause a Denial of Service (DoS) via CPU consumption due to packets with forged source addresses that cause a large number of hash table collisions related to the PREROUTING chain.
  • CAN-2003-0246: The ioperm implementation in 2.4.20 and earlier kernels does not properly restrict privileges, which allows local users to gain read or write access to certain I/O ports.
  • CAN-2003-0247: A vulnerability in the TTY layer of the 2.4 kernel allows attackers to cause a kernel oops resulting in a DoS.
  • CAN-2003-0248: The mxcsr code in the 2.4 kernel allows attackers to modify CPU state registers via a malformed address.
  • CAN-2003-0462: A file read race existed in the execve() system call.

As well, a number of bug fixes were made in the 9.1 kernel including:

  • Support for more machines that did not work with APIC
  • Audigy2 support
  • New/updated modules: prims25, adiusbadsl, thinkpad, ieee1394, orinoco, via-rhine,
  • Fixed SiS IOAPIC
  • IRQ balancing has been fixed for SMP
  • Updates to ext3
  • The previous ptrace fix has been redone to work better
  • Bugs with compiling kernels using xconfig have been fixed
  • Problems with ipsec have been corrected
  • XFS ACLs are now present
  • gdb not working on XFS root filesystems has been fixed

MandrakeSoft encourages all users to upgrade to these new kernels. Updated kernels will be available shortly for other supported platforms and architectures.

For full instructions on how to properly upgrade your kernel, please review


The kernels provided in MDKSA-2003:066-1 (2.4.21-0.24mdk) had a problem where all files created on any filesystem other than XFS, and using any kernel other than kernel-secure, would be created with mode 0666, or world writeable. The 0.24mdk kernels have been removed from the mirrors and users are encouraged to upgrade and remove those kernels from their systems to prevent accidentally booting into them.

That issue has been addressed and fixed with these new kernels.


Updated Packages:

Mandrake Linux 9.1:
419058c00d6cbc637c3a8fc8856438ef 9.1/RPMS/kernel-
9a4382eef9022e9d650171e9b99e40e8 9.1/RPMS/kernel-BOOT-
8fb033ae79f8d62ef7db8116dbd8a258 9.1/RPMS/kernel-doc-2.4.21-0.25mdk.i586.rpm
7c4446a519dc48c70a13e8765c19c35f 9.1/RPMS/kernel-enterprise-
7b1824f5cc6e22f7a2ff8d21be497e57 9.1/RPMS/kernel-secure-
1a1b38775940278848e30ad740552748 9.1/RPMS/kernel-smp-
680b79e2591161ba6829fd3656f16abb 9.1/RPMS/kernel-source-2.4.21-0.25mdk.i586.rpm
ecb903bcd0dd169eeb53f534638b7cd7 9.1/SRPMS/kernel-

Mandrake Linux 9.1/PPC:
558d5d6784f15775a5c9b8da0855fdeb ppc/9.1/RPMS/kernel-
b402ff80467c57470eff93b59e929045 ppc/9.1/RPMS/kernel-doc-2.4.21-0.25mdk.ppc.rpm
bbf10a690a4ad709b20aed72efd59319 ppc/9.1/RPMS/kernel-enterprise-
8f55bcf38b775c0ddfb3d6c2e9f8bcae ppc/9.1/RPMS/kernel-smp-
770db5f9460490b2ad47ea2863be1c38 ppc/9.1/RPMS/kernel-source-2.4.21-0.25mdk.ppc.rpm
ecb903bcd0dd169eeb53f534638b7cd7 ppc/9.1/SRPMS/kernel-

Bug IDs fixed (see for more information):

3615 - no acls in XFS
4059 - xconfig aborts with an error
4060 - xconfig unable to disable certain options

To upgrade automatically, use MandrakeUpdate or urpmi. The verification of md5 checksums and GPG signatures is performed automatically for you.

A list of FTP mirrors can be obtained from:

All packages are signed by MandrakeSoft for security. You can obtain the GPG public key of the Mandrake Linux Security Team by executing:

gpg --recv-keys --keyserver 0x22458A98

Please be aware that sometimes it takes the mirrors a few hours to update.

You can view other update advisories for Mandrake Linux at:

MandrakeSoft has several security-related mailing list services that anyone can subscribe to. Information on these lists can be obtained by visiting:

If you want to report vulnerabilities, please contact

Type Bits/KeyID Date User ID
pub 1024D/22458A98 2000-07-10 Linux Mandrake Security Team