Ubuntu Security Notice USN-518-1
24th September, 2007
linux-source-2.6.15, linux-source-2.6.17, linux-source-2.6.20 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 7.04
- Ubuntu 6.10
- Ubuntu 6.06 LTS
Software description
- 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 version:
- 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 LTS:
- 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
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system upgrade you need to reboot your computer to
effect the necessary changes.