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Mandrake: kernel 2.2 multiple vulnerabilities Print E-mail
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Posted by Team   
Mandrake A number of vulnerabilities have been found in the Linux 2.2 kernel that have been addressed with the latest 2.2.25 release.


                Mandrake Linux Security Update Advisory

Package name:           kernel22
Advisory ID:            MDKSA-2003:039
Date:                   March 27th, 2003

Affected versions:	7.2, 8.1, 8.2, Single Network Firewall 7.2

Problem Description:

 A number of vulnerabilities have been found in the Linux 2.2
 kernel that have been addressed with the latest 2.2.25 release.
 A bug in the kernel module loader code could allow a local user to 
 gain root privileges.  This is done by a local user using ptrace and 
 attaching to a modprobe process that is spawned if the user triggers 
 the loading of a kernel module.
 A temporary workaround can be used to defend against this flaw. It is 
 possible to temporarily disable the kmod kernel module loading 
 subsystem in the kernel after all of the required kernel modules have 
 been loaded.  Be sure that you do not need to load additional kernel 
 modules after implementing this workaround. To use it, as root execute:
   echo /no/such/file >/proc/sys/kernel/modprobe
 To automate this, you may wish to add it as the last line of the 
 /etc/rc.d/rc.local file.  You can revert this change by replacing the 
 content "/sbin/modprobe" in the /proc/sys/kernel/modprobe file.  The 
 root user can still manually load kernel modules with this workaround 
 in place.
 As well, multiple ethernet device drivers do not pad frames with null
 bytes, which could allow remote attackers to obtain information from 
 previous packets or kernel memory by using malformed packets.
 Finally, the 2.2 kernel allows local users to cause a crash of the host 
 system by using the mmap() function with a PROT_READ parameter to 
 access non-readable memory pages through the /proc/pid/mem interface.
 All users are encouraged to upgrade to the latest kernel version
 For instructions on how to upgrade your kernel in Mandrake Linux, 
 please refer to:


Updated Packages:
 Linux-Mandrake 7.2:
 bdb1e2835881bf1d22637629478400c1  7.2/RPMS/alsa-2.2.25_0.5.11-1.1mdk.i586.rpm
 6ed6ccbdc7fde53b95a9ae7bbb238485  7.2/RPMS/alsa-source-2.2.25_0.5.11-1.1mdk.i586.rpm
 3ad19bb95ff47789ca5a8b2c16ac5a29  7.2/RPMS/kernel-2.2.25-1.1mdk.i586.rpm
 e7a8903aafe28412a52d034a29a44a94  7.2/RPMS/kernel-doc-2.2.25-1.1mdk.i586.rpm
 fb611f37591a939e27863d43051de72e  7.2/RPMS/kernel-headers-2.2.25-1.1mdk.i586.rpm
 7bdd5c57b27752fe04b402be6d099622  7.2/RPMS/kernel-pcmcia-cs-2.2.25-1.1mdk.i586.rpm
 d1d8793f10fb72a4c051076e8980b80a  7.2/RPMS/kernel-secure-2.2.25-1.1mdk.i586.rpm
 96030d790e275f633a53a08b0fe5fbf2  7.2/RPMS/kernel-smp-2.2.25-1.1mdk.i586.rpm
 97448e85af33e74426ee527e3ad8eba1  7.2/RPMS/kernel-source-2.2.25-1.1mdk.i586.rpm
 63049cd8a930bec0f1c340f801819cfb  7.2/RPMS/kernel-utils-2.2.25-1.1mdk.i586.rpm
 453c0a9ffaa157f0f0bc1d4d29e95cd5  7.2/RPMS/reiserfs-utils-2.2.25_3.5.29-1.1mdk.i586.rpm
 6307ab8e58716866c8289f5ab109758f  7.2/SRPMS/kernel-2.2.25-1.1mdk.src.rpm

 Mandrake Linux 8.1:
 38bf220ae12b3e92a370ed6130b16763  8.1/RPMS/kernel22-2.2.25-1.1mdk.i586.rpm
 3bf3557a66c27083c44ae2fdd6f3540e  8.1/RPMS/kernel22-smp-2.2.25-1.1mdk.i586.rpm
 8a1d62727171bf6fa61f141683750d35  8.1/RPMS/kernel22-source-2.2.25-1.1mdk.i586.rpm
 2ec4d3ac5cc53ed67295d97ec4bde4a7  8.1/SRPMS/kernel22-2.2.25-1.1mdk.src.rpm

 Mandrake Linux 8.2:
 59c784593c39afd3ad513887d7da30e4  8.2/RPMS/kernel22-2.2.25-1.1mdk.i586.rpm
 de18fcc6874678992426053f3797893a  8.2/RPMS/kernel22-smp-2.2.25-1.1mdk.i586.rpm
 588724e44106875bab25611b1e69a350  8.2/RPMS/kernel22-source-2.2.25-1.1mdk.i586.rpm
 2ec4d3ac5cc53ed67295d97ec4bde4a7  8.2/SRPMS/kernel22-2.2.25-1.1mdk.src.rpm

 Mandrake Linux 8.2/PPC:
 1ae4276c52de38f6d47e1f091a7540d0  ppc/8.2/RPMS/kernel22-2.2.25-1.1mdk.ppc.rpm
 fe2b6d839185afae247292bd74cc324c  ppc/8.2/RPMS/kernel22-smp-2.2.25-1.1mdk.ppc.rpm
 051cd86960670e68e6f785f4dabf9017  ppc/8.2/RPMS/kernel22-source-2.2.25-1.1mdk.ppc.rpm
 2ec4d3ac5cc53ed67295d97ec4bde4a7  ppc/8.2/SRPMS/kernel22-2.2.25-1.1mdk.src.rpm

 Single Network Firewall 7.2:
 3ad19bb95ff47789ca5a8b2c16ac5a29  snf7.2/RPMS/kernel-2.2.25-1.1mdk.i586.rpm
 e7a8903aafe28412a52d034a29a44a94  snf7.2/RPMS/kernel-doc-2.2.25-1.1mdk.i586.rpm
 fb611f37591a939e27863d43051de72e  snf7.2/RPMS/kernel-headers-2.2.25-1.1mdk.i586.rpm
 7bdd5c57b27752fe04b402be6d099622  snf7.2/RPMS/kernel-pcmcia-cs-2.2.25-1.1mdk.i586.rpm
 d1d8793f10fb72a4c051076e8980b80a  snf7.2/RPMS/kernel-secure-2.2.25-1.1mdk.i586.rpm
 96030d790e275f633a53a08b0fe5fbf2  snf7.2/RPMS/kernel-smp-2.2.25-1.1mdk.i586.rpm
 97448e85af33e74426ee527e3ad8eba1  snf7.2/RPMS/kernel-source-2.2.25-1.1mdk.i586.rpm
 63049cd8a930bec0f1c340f801819cfb  snf7.2/RPMS/kernel-utils-2.2.25-1.1mdk.i586.rpm
 453c0a9ffaa157f0f0bc1d4d29e95cd5  snf7.2/RPMS/reiserfs-utils-2.2.25_3.5.29-1.1mdk.i586.rpm
 6307ab8e58716866c8289f5ab109758f  snf7.2/SRPMS/kernel-2.2.25-1.1mdk.src.rpm

Bug IDs fixed (see for more information):

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

If you want to upgrade manually, download the updated package from one
of our FTP server mirrors and upgrade with "rpm -Fvh *.rpm".  A list of
FTP mirrors can be obtained from:

Please verify the update prior to upgrading to ensure the integrity of
the downloaded package.  You can do this with the command:

  rpm --checksig 

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

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

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

If you want to report vulnerabilities, please contact

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

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