RHSA-2006:0617 - Security Advisory

Topic

Updated kernel packages that fix several security issues in the Red Hat
Enterprise Linux 4 kernel are now available.

This security advisory has been rated as having important security impact
by the Red Hat Security Response Team.

Description

The Linux kernel handles the basic functions of the operating system.

These new kernel packages contain fixes for the security issues described
below:

• a flaw in the proc file system that allowed a local user to use a

suid-wrapper for scripts to gain root privileges (CVE-2006-3626, Important)

• a flaw in the SCTP implementation that allowed a local user to cause a

denial of service (panic) or to possibly gain root privileges
(CVE-2006-3745, Important)

• a flaw in NFS exported ext2/ext3 partitions when handling invalid inodes

that allowed a remote authenticated user to cause a denial of service
(filesystem panic) (CVE-2006-3468, Important)

• a flaw in the restore_all code path of the 4/4GB split support of

non-hugemem kernels that allowed a local user to cause a denial of service
(panic) (CVE-2006-2932, Important)

• a flaw in IPv4 netfilter handling for the unlikely use of SNMP NAT

processing that allowed a remote user to cause a denial of service (crash)
or potential memory corruption (CVE-2006-2444, Moderate)

• a flaw in the DVD handling of the CDROM driver that could be used

together with a custom built USB device to gain root privileges
(CVE-2006-2935, Moderate)

• a flaw in the handling of O_DIRECT writes that allowed a local user

to cause a denial of service (memory consumption) (CVE-2004-2660, Low)

• a flaw in the SCTP chunk length handling that allowed a remote user to

cause a denial of service (crash) (CVE-2006-1858, Low)

• a flaw in the input handling of the ftdi_sio driver that allowed a local

user to cause a denial of service (memory consumption) (CVE-2006-2936, Low)

In addition a bugfix was added to enable a clean reboot for the IBM Pizzaro
machines.

Red Hat would like to thank Wei Wang of McAfee Avert Labs and Kirill
Korotaev for reporting issues fixed in this erratum.

All Red Hat Enterprise Linux 4 users are advised to upgrade their kernels
to the packages associated with their machine architectures and
configurations as listed in this erratum.

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

This update is available via Red Hat Network. To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

Affected Products

• Red Hat Enterprise Linux Server 4 x86_64
• Red Hat Enterprise Linux Server 4 ia64
• Red Hat Enterprise Linux Server 4 i386
• Red Hat Enterprise Linux Workstation 4 x86_64
• Red Hat Enterprise Linux Workstation 4 ia64
• Red Hat Enterprise Linux Workstation 4 i386
• Red Hat Enterprise Linux Desktop 4 x86_64
• Red Hat Enterprise Linux Desktop 4 i386
• Red Hat Enterprise Linux for IBM z Systems 4 s390x
• Red Hat Enterprise Linux for IBM z Systems 4 s390
• Red Hat Enterprise Linux for Power, big endian 4 ppc

Fixes

• BZ - 191736 - CVE-2004-2660 O_DIRECT write sometimes leaks memory
• BZ - 192632 - CVE-2006-2444 SNMP NAT netfilter memory corruption
• BZ - 192636 - CVE-2006-1858 SCTP chunk length overflow
• BZ - 196280 - CVE-2006-2932 bogus %ds/%es security issue in restore_all
• BZ - 197610 - CVE-2006-2936 Possible DoS in write routine of ftdi_sio driver
• BZ - 197670 - CVE-2006-2935 Possible buffer overflow in DVD handling
• BZ - 198973 - CVE-2006-3626 Nasty /proc privilege escalation
• BZ - 199172 - CVE-2006-3468 Bogus FH in NFS request causes DoS in file system code
• BZ - 200111 - Can't reboot/halt on IBM Pizzaro machine
• BZ - 202122 - CVE-2006-3745 Local SCTP privilege escalation

CVEs

• CVE-2006-2444
• CVE-2006-3745
• CVE-2006-1858
• CVE-2006-3468
• CVE-2006-2936
• CVE-2006-2935
• CVE-2004-2660
• CVE-2006-2932
• CVE-2006-3626

References

• http://www.redhat.com/security/updates/classification/#important