RHSA-2006:0493 - 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 IPv6 implementation that allowed a local user to cause a

denial of service (infinite loop and crash) (CVE-2005-2973, important)

• a flaw in the bridge implementation that allowed a remote user to

cause forwarding of spoofed packets via poisoning of the forwarding
table with already dropped frames (CVE-2005-3272, moderate)

• a flaw in the atm module that allowed a local user to cause a denial

of service (panic) via certain socket calls (CVE-2005-3359, important)

• a flaw in the NFS client implementation that allowed a local user to

cause a denial of service (panic) via O_DIRECT writes (CVE-2006-0555,
important)

• a difference in "sysretq" operation of EM64T (as opposed to Opteron)

processors that allowed a local user to cause a denial of service
(crash) upon return from certain system calls (CVE-2006-0741 and
CVE-2006-0744, important)

• a flaw in the keyring implementation that allowed a local user to

cause a denial of service (OOPS) (CVE-2006-1522, important)

• a flaw in IP routing implementation that allowed a local user to cause

a denial of service (panic) via a request for a route for a multicast IP
(CVE-2006-1525, important)

• a flaw in the SCTP-netfilter implementation that allowed a remote user

to cause a denial of service (infinite loop) (CVE-2006-1527, important)

• a flaw in the sg driver that allowed a local user to cause a denial of

service (crash) via a dio transfer to memory mapped (mmap) IO space
(CVE-2006-1528, important)

• a flaw in the threading implementation that allowed a local user to

cause a denial of service (panic) (CVE-2006-1855, important)

• two missing LSM hooks that allowed a local user to bypass the LSM by

using readv() or writev() (CVE-2006-1856, moderate)

• a flaw in the virtual memory implementation that allowed local user to

cause a denial of service (panic) by using the lsof command
(CVE-2006-1862, important)

• a directory traversal vulnerability in smbfs that allowed a local user

to escape chroot restrictions for an SMB-mounted filesystem via "..\\"
sequences (CVE-2006-1864, moderate)

• a flaw in the ECNE chunk handling of SCTP that allowed a remote user

to cause a denial of service (panic) (CVE-2006-2271, moderate)

• a flaw in the handling of COOKIE_ECHO and HEARTBEAT control chunks of

SCTP that allowed a remote user to cause a denial of service (panic)
(CVE-2006-2272, moderate)

• a flaw in the handling of DATA fragments of SCTP that allowed a remote

user to cause a denial of service (infinite recursion and crash)
(CVE-2006-2274, moderate)

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 that all previously-released
errata relevant to your system have been applied. Use Red Hat
Network to download and update your packages. To launch the Red Hat
Update Agent, use the following command:

up2date

For information on how to install packages manually, refer to the
following Web page for the System Administration or Customization
guide specific to your system:

http://www.redhat.com/docs/manuals/enterprise/

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 - 168791 - CVE-2006-1528 Possible local crash by dio/mmap sg driver
• BZ - 170772 - CVE-2005-2973 ipv6 infinite loop
• BZ - 171383 - CVE-2005-3272 bridge poisoning
• BZ - 175769 - CVE-2005-3359 incorrect inrement/decrement in atm module leads to panic
• BZ - 181795 - CVE-2006-0555 NFS client panic using O_DIRECT
• BZ - 183489 - CVE-2006-0741 bad elf entry address (CVE-2006-0744)
• BZ - 187841 - CVE-2006-1855 Old thread debugging causes false BUG() in choose_new_parent
• BZ - 188466 - CVE-2006-1522 DoS/bug in keyring code (security/keys/)
• BZ - 189260 - CVE-2006-1862 The lsof command triggers a kernel oops under heavy load
• BZ - 189346 - CVE-2006-1525 ip_route_input() panic
• BZ - 189435 - CVE-2006-1864 smbfs chroot issue
• BZ - 190460 - CVE-2006-1527 netfilter/sctp: lockup in sctp_new()
• BZ - 191201 - CVE-2006-2271 SCTP ECNE chunk handling DoS
• BZ - 191202 - CVE-2006-2272 SCTP incoming COOKIE_ECHO and HEARTBEAT packets DoS
• BZ - 191258 - CVE-2006-2274 SCTP DATA fragments DoS
• BZ - 191524 - CVE-2006-1856 LSM missing readv/writev

CVEs

• CVE-2005-2973
• CVE-2006-1864
• CVE-2006-1528
• CVE-2006-1527
• CVE-2006-0741
• CVE-2006-1525
• CVE-2006-0744
• CVE-2006-1522
• CVE-2006-1862
• CVE-2005-3359
• CVE-2005-3272
• CVE-2006-1856
• CVE-2006-2272
• CVE-2006-2274
• CVE-2006-0555
• CVE-2006-1855
• CVE-2006-2271

References

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