USN-244-1: Linux kernel vulnerabilities

Releases

• Ubuntu 5.10
• Ubuntu 5.04
• Ubuntu 4.10

Details

Doug Chapman discovered a flaw in the reference counting in the
sys_mq_open() function. By calling this function in a special way, a
local attacker could exploit this to cause a kernel crash.
(CVE-2005-3356)

Karl Janmar discovered that the /proc file system module used signed
data types in a wrong way. A local attacker could exploit this to read
random kernel memory, which could possibly contain sensitive data like
passwords or private keys. (CVE-2005-4605)

Yi Yang discovered an off-by-one buffer overflow in the sysctl()
system call. By calling sysctl with a specially crafted long string, a
local attacker could exploit this to crash the kernel or possibly even
execute arbitrary code with full kernel privileges. (CVE-2005-4618)

Perceval Anichini found a buffer overflow in the TwinHan DST
Frontend/Card DVB driver. A local user could exploit this to crash the
kernel or possibly execute arbitrary code with full kernel privileges.
This only affects Ubuntu 5.10. (CVE-2005-4639)

Stefan Rompf discovered that the dm-crypt module did not clear memory
structures before releasing the memory allocation of it. This could
lead to the disclosure of encryption keys. (CVE-2006-0095)

The SDLA WAN driver did not restrict firmware upgrades to processes
that have the CAP_SYS_RAWIO kernel capability, it just required the
CAP_NET_ADMIN privilege. This could allow processes with the latter
privilege to update the SDLA firmware. Please note that this does not
affect a standard Ubuntu installation, and this cannot be exploited by
a normal (unprivileged) user. At most, this flaw might be relevant for
installations that use a fine-grained capability granting system like
RSBAC, cap_over, or grsecurity. This only affects Ubuntu 4.10.
(CVE-2006-0096)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 5.10

• linux-patch-ubuntu-2.6.10 -
• linux-image-2.6.12-10-powerpc-smp -
• linux-patch-ubuntu-2.6.12 -
• linux-image-2.6.12-10-itanium-smp -
• linux-image-2.6.8.1-6-power3-smp -
• linux-image-2.6.8.1-6-amd64-k8-smp -
• linux-image-2.6.10-6-686 -
• linux-image-2.6.10-6-powerpc -
• linux-image-2.6.10-6-itanium -
• linux-image-2.6.10-6-power4-smp -
• linux-image-2.6.12-10-powerpc64-smp -
• linux-image-2.6.8.1-6-k7 -
• linux-image-2.6.8.1-6-powerpc -
• linux-image-2.6.12-10-amd64-generic -
• linux-image-2.6.12-10-iseries-smp -
• linux-image-2.6.12-10-k7-smp -
• linux-image-2.6.8.1-6-amd64-xeon -
• linux-image-2.6.12-10-amd64-xeon -
• linux-image-2.6.8.1-6-power4 -
• linux-image-2.6.8.1-6-amd64-k8 -
• linux-image-2.6.10-6-386 -
• linux-image-2.6.8.1-6-power3 -
• linux-image-2.6.12-10-itanium -
• linux-image-2.6.12-10-powerpc -
• linux-image-2.6.10-6-amd64-xeon -
• linux-image-2.6.12-10-mckinley -
• linux-image-2.6.10-6-itanium-smp -
• linux-image-2.6.10-6-powerpc-smp -
• linux-image-2.6.10-6-power4 -
• linux-image-2.6.8.1-6-power4-smp -
• linux-image-2.6.10-6-power3 -
• linux-image-2.6.8.1-6-386 -
• linux-image-2.6.8.1-6-powerpc-smp -
• linux-image-2.6.10-6-k7 -
• linux-image-2.6.12-10-amd64-k8-smp -
• linux-image-2.6.10-6-k7-smp -
• linux-image-2.6.12-10-686 -
• linux-image-2.6.10-6-mckinley -
• linux-image-2.6.12-10-686-smp -
• linux-image-2.6.10-6-686-smp -
• linux-image-2.6.8.1-6-amd64-generic -
• linux-image-2.6.10-6-power3-smp -
• linux-image-2.6.10-6-amd64-k8-smp -
• linux-image-2.6.12-10-k7 -
• linux-image-2.6.10-6-amd64-generic -
• linux-image-2.6.8.1-6-686 -
• linux-image-2.6.10-6-amd64-k8 -
• linux-image-2.6.12-10-mckinley-smp -
• linux-image-2.6.8.1-6-686-smp -
• linux-patch-debian-2.6.8.1 -
• linux-image-2.6.8.1-6-k7-smp -
• linux-image-2.6.12-10-386 -
• linux-image-2.6.10-6-mckinley-smp -
• linux-image-2.6.12-10-amd64-k8 -

Ubuntu 5.04

• linux-patch-ubuntu-2.6.10 -
• linux-image-2.6.12-10-powerpc-smp -
• linux-patch-ubuntu-2.6.12 -
• linux-image-2.6.12-10-itanium-smp -
• linux-image-2.6.8.1-6-power3-smp -
• linux-image-2.6.8.1-6-amd64-k8-smp -
• linux-image-2.6.10-6-686 -
• linux-image-2.6.10-6-powerpc -
• linux-image-2.6.10-6-itanium -
• linux-image-2.6.10-6-power4-smp -
• linux-image-2.6.12-10-powerpc64-smp -
• linux-image-2.6.8.1-6-k7 -
• linux-image-2.6.8.1-6-powerpc -
• linux-image-2.6.12-10-amd64-generic -
• linux-image-2.6.12-10-iseries-smp -
• linux-image-2.6.12-10-k7-smp -
• linux-image-2.6.8.1-6-amd64-xeon -
• linux-image-2.6.12-10-amd64-xeon -
• linux-image-2.6.8.1-6-power4 -
• linux-image-2.6.8.1-6-amd64-k8 -
• linux-image-2.6.10-6-386 -
• linux-image-2.6.8.1-6-power3 -
• linux-image-2.6.12-10-itanium -
• linux-image-2.6.12-10-powerpc -
• linux-image-2.6.10-6-amd64-xeon -
• linux-image-2.6.12-10-mckinley -
• linux-image-2.6.10-6-itanium-smp -
• linux-image-2.6.10-6-powerpc-smp -
• linux-image-2.6.10-6-power4 -
• linux-image-2.6.8.1-6-power4-smp -
• linux-image-2.6.10-6-power3 -
• linux-image-2.6.8.1-6-386 -
• linux-image-2.6.8.1-6-powerpc-smp -
• linux-image-2.6.10-6-k7 -
• linux-image-2.6.12-10-amd64-k8-smp -
• linux-image-2.6.10-6-k7-smp -
• linux-image-2.6.12-10-686 -
• linux-image-2.6.10-6-mckinley -
• linux-image-2.6.12-10-686-smp -
• linux-image-2.6.10-6-686-smp -
• linux-image-2.6.8.1-6-amd64-generic -
• linux-image-2.6.10-6-power3-smp -
• linux-image-2.6.10-6-amd64-k8-smp -
• linux-image-2.6.12-10-k7 -
• linux-image-2.6.10-6-amd64-generic -
• linux-image-2.6.8.1-6-686 -
• linux-image-2.6.10-6-amd64-k8 -
• linux-image-2.6.12-10-mckinley-smp -
• linux-image-2.6.8.1-6-686-smp -
• linux-patch-debian-2.6.8.1 -
• linux-image-2.6.8.1-6-k7-smp -
• linux-image-2.6.12-10-386 -
• linux-image-2.6.10-6-mckinley-smp -
• linux-image-2.6.12-10-amd64-k8 -

Ubuntu 4.10

• linux-patch-ubuntu-2.6.10 -
• linux-image-2.6.12-10-powerpc-smp -
• linux-patch-ubuntu-2.6.12 -
• linux-image-2.6.12-10-itanium-smp -
• linux-image-2.6.8.1-6-power3-smp -
• linux-image-2.6.8.1-6-amd64-k8-smp -
• linux-image-2.6.10-6-686 -
• linux-image-2.6.10-6-powerpc -
• linux-image-2.6.10-6-itanium -
• linux-image-2.6.10-6-power4-smp -
• linux-image-2.6.12-10-powerpc64-smp -
• linux-image-2.6.8.1-6-k7 -
• linux-image-2.6.8.1-6-powerpc -
• linux-image-2.6.12-10-amd64-generic -
• linux-image-2.6.12-10-iseries-smp -
• linux-image-2.6.12-10-k7-smp -
• linux-image-2.6.8.1-6-amd64-xeon -
• linux-image-2.6.12-10-amd64-xeon -
• linux-image-2.6.8.1-6-power4 -
• linux-image-2.6.8.1-6-amd64-k8 -
• linux-image-2.6.10-6-386 -
• linux-image-2.6.8.1-6-power3 -
• linux-image-2.6.12-10-itanium -
• linux-image-2.6.12-10-powerpc -
• linux-image-2.6.10-6-amd64-xeon -
• linux-image-2.6.12-10-mckinley -
• linux-image-2.6.10-6-itanium-smp -
• linux-image-2.6.10-6-powerpc-smp -
• linux-image-2.6.10-6-power4 -
• linux-image-2.6.8.1-6-power4-smp -
• linux-image-2.6.10-6-power3 -
• linux-image-2.6.8.1-6-386 -
• linux-image-2.6.8.1-6-powerpc-smp -
• linux-image-2.6.10-6-k7 -
• linux-image-2.6.12-10-amd64-k8-smp -
• linux-image-2.6.10-6-k7-smp -
• linux-image-2.6.12-10-686 -
• linux-image-2.6.10-6-mckinley -
• linux-image-2.6.12-10-686-smp -
• linux-image-2.6.10-6-686-smp -
• linux-image-2.6.8.1-6-amd64-generic -
• linux-image-2.6.10-6-power3-smp -
• linux-image-2.6.10-6-amd64-k8-smp -
• linux-image-2.6.12-10-k7 -
• linux-image-2.6.10-6-amd64-generic -
• linux-image-2.6.8.1-6-686 -
• linux-image-2.6.10-6-amd64-k8 -
• linux-image-2.6.12-10-mckinley-smp -
• linux-image-2.6.8.1-6-686-smp -
• linux-patch-debian-2.6.8.1 -
• linux-image-2.6.8.1-6-k7-smp -
• linux-image-2.6.12-10-386 -
• linux-image-2.6.10-6-mckinley-smp -
• linux-image-2.6.12-10-amd64-k8 -

In general, a standard system update will make all the necessary changes.

References

• CVE-2006-0095
• CVE-2005-3356
• CVE-2005-4639
• CVE-2006-0096
• CVE-2005-4605
• CVE-2005-4618