USN-518-1: linux-source-2.6.15, linux-source-2.6.17, linux-source-2.6.20 vulnerabilities

Releases

• Ubuntu 7.04
• Ubuntu 6.10
• Ubuntu 6.06

Packages

• linux-source-2.6.15 -
• linux-source-2.6.17 -
• linux-source-2.6.20 -

Details

Evan Teran discovered that the Linux kernel ptrace routines did not
correctly handle certain requests robustly. Local attackers could exploit
this to crash the system, causing a denial of service. (CVE-2007-3731)

It was discovered that hugetlb kernels on PowerPC systems did not prevent
the stack from colliding with reserved kernel memory. Local attackers
could exploit this and crash the system, causing a denial of service.
(CVE-2007-3739)

It was discovered that certain CIFS filesystem actions did not honor
the umask of a process. Local attackers could exploit this to gain
additional privileges. (CVE-2007-3740)

Wojciech Purczynski discovered that the Linux kernel ia32 syscall
emulation in x86_64 kernels did not correctly clear the high bits of
registers. Local attackers could exploit this to gain root privileges.
(CVE-2007-4573)

Update instructions

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

Ubuntu 7.04

• linux-image-2.6.20-16-386 - 2.6.20-16.32
• linux-image-2.6.20-16-powerpc - 2.6.20-16.32
• linux-image-2.6.20-16-server - 2.6.20-16.32
• linux-image-2.6.20-16-mckinley - 2.6.20-16.32
• linux-image-2.6.20-16-sparc64-smp - 2.6.20-16.32
• linux-image-2.6.20-16-hppa32 - 2.6.20-16.32
• linux-image-2.6.20-16-powerpc64-smp - 2.6.20-16.32
• linux-image-2.6.20-16-itanium - 2.6.20-16.32
• linux-image-2.6.20-16-powerpc-smp - 2.6.20-16.32
• linux-image-2.6.20-16-generic - 2.6.20-16.32
• linux-image-2.6.20-16-sparc64 - 2.6.20-16.32
• linux-image-2.6.20-16-hppa64 - 2.6.20-16.32
• linux-image-2.6.20-16-lowlatency - 2.6.20-16.32
• linux-image-2.6.20-16-server-bigiron - 2.6.20-16.32

Ubuntu 6.10

• linux-image-2.6.17-12-mckinley - 2.6.17.1-12.41
• linux-image-2.6.17-12-powerpc64-smp - 2.6.17.1-12.41
• linux-image-2.6.17-12-hppa32 - 2.6.17.1-12.41
• linux-image-2.6.17-12-hppa64 - 2.6.17.1-12.41
• linux-image-2.6.17-12-sparc64-smp - 2.6.17.1-12.41
• linux-image-2.6.17-12-generic - 2.6.17.1-12.41
• linux-image-2.6.17-12-powerpc-smp - 2.6.17.1-12.41
• linux-image-2.6.17-12-386 - 2.6.17.1-12.41
• linux-image-2.6.17-12-server-bigiron - 2.6.17.1-12.41
• linux-image-2.6.17-12-itanium - 2.6.17.1-12.41
• linux-image-2.6.17-12-powerpc - 2.6.17.1-12.41
• linux-image-2.6.17-12-sparc64 - 2.6.17.1-12.41
• linux-image-2.6.17-12-server - 2.6.17.1-12.41

Ubuntu 6.06

• linux-image-2.6.15-29-amd64-xeon - 2.6.15-29.60
• linux-image-2.6.15-29-hppa32-smp - 2.6.15-29.60
• linux-image-2.6.15-29-server-bigiron - 2.6.15-29.60
• linux-image-2.6.15-29-386 - 2.6.15-29.60
• linux-image-2.6.15-29-686 - 2.6.15-29.60
• linux-image-2.6.15-29-powerpc - 2.6.15-29.60
• linux-image-2.6.15-29-sparc64 - 2.6.15-29.60
• linux-image-2.6.15-29-amd64-k8 - 2.6.15-29.60
• linux-image-2.6.15-29-hppa32 - 2.6.15-29.60
• linux-image-2.6.15-29-k7 - 2.6.15-29.60
• linux-image-2.6.15-29-hppa64-smp - 2.6.15-29.60
• linux-image-2.6.15-29-mckinley-smp - 2.6.15-29.60
• linux-image-2.6.15-29-amd64-generic - 2.6.15-29.60
• linux-image-2.6.15-29-itanium-smp - 2.6.15-29.60
• linux-image-2.6.15-29-amd64-server - 2.6.15-29.60
• linux-image-2.6.15-29-itanium - 2.6.15-29.60
• linux-image-2.6.15-29-powerpc-smp - 2.6.15-29.60
• linux-image-2.6.15-29-powerpc64-smp - 2.6.15-29.60
• linux-image-2.6.15-29-server - 2.6.15-29.60
• linux-image-2.6.15-29-mckinley - 2.6.15-29.60
• linux-image-2.6.15-29-hppa64 - 2.6.15-29.60
• linux-image-2.6.15-29-sparc64-smp - 2.6.15-29.60

After a standard system upgrade you need to reboot your computer to
effect the necessary changes.

References

• CVE-2007-3731
• CVE-2007-3739
• CVE-2007-3740
• CVE-2007-4573