USN-1189-1: Linux kernel vulnerabilities

19 August 2011

linux vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 8.04 LTS

Summary

Multiple kernel flaws were fixed.

Software Description

  • linux - Linux kernel

Details

It was discovered that the /proc filesystem did not correctly handle permission changes when programs executed. A local attacker could hold open files to examine details about programs running with higher privileges, potentially increasing the chances of exploiting additional vulnerabilities. (CVE-2011-1020)

Vasiliy Kulikov discovered that the Bluetooth stack did not correctly clear memory. A local attacker could exploit this to read kernel stack memory, leading to a loss of privacy. (CVE-2011-1078)

Vasiliy Kulikov discovered that the Bluetooth stack did not correctly check that device name strings were NULL terminated. A local attacker could exploit this to crash the system, leading to a denial of service, or leak contents of kernel stack memory, leading to a loss of privacy. (CVE-2011-1079)

Vasiliy Kulikov discovered that bridge network filtering did not check that name fields were NULL terminated. A local attacker could exploit this to leak contents of kernel stack memory, leading to a loss of privacy. (CVE-2011-1080)

Johan Hovold discovered that the DCCP network stack did not correctly handle certain packet combinations. A remote attacker could send specially crafted network traffic that would crash the system, leading to a denial of service. (CVE-2011-1093)

Peter Huewe discovered that the TPM device did not correctly initialize memory. A local attacker could exploit this to read kernel heap memory contents, leading to a loss of privacy. (CVE-2011-1160)

Dan Rosenberg discovered that the IRDA subsystem did not correctly check certain field sizes. If a system was using IRDA, a remote attacker could send specially crafted traffic to crash the system or gain root privileges. (CVE-2011-1180)

Dan Rosenberg discovered that the X.25 Rose network stack did not correctly handle certain fields. If a system was running with Rose enabled, a remote attacker could send specially crafted traffic to gain root privileges. (CVE-2011-1493)

It was discovered that Bluetooth l2cap and rfcomm did not correctly initialize structures. A local attacker could exploit this to read portions of the kernel stack, leading to a loss of privacy. (CVE-2011-2492)

Dan Rosenberg discovered flaws in the linux Rose (X.25 PLP) layer used by amateur radio. A local user or a remote user on an X.25 network could exploit these flaws to execute arbitrary code as root. (CVE-2011-4913)

Ben Hutchings discovered several flaws in the Linux Rose (X.25 PLP) layer. A local user or a remote user on an X.25 network could exploit these flaws to execute arbitrary code as root. (CVE-2011-4914)

Update instructions

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

Ubuntu 8.04 LTS
linux-image-2.6.24-29-386 - 2.6.24-29.93
linux-image-2.6.24-29-generic - 2.6.24-29.93
linux-image-2.6.24-29-hppa32 - 2.6.24-29.93
linux-image-2.6.24-29-hppa64 - 2.6.24-29.93
linux-image-2.6.24-29-itanium - 2.6.24-29.93
linux-image-2.6.24-29-lpia - 2.6.24-29.93
linux-image-2.6.24-29-lpiacompat - 2.6.24-29.93
linux-image-2.6.24-29-mckinley - 2.6.24-29.93
linux-image-2.6.24-29-openvz - 2.6.24-29.93
linux-image-2.6.24-29-powerpc - 2.6.24-29.93
linux-image-2.6.24-29-powerpc-smp - 2.6.24-29.93
linux-image-2.6.24-29-powerpc64-smp - 2.6.24-29.93
linux-image-2.6.24-29-rt - 2.6.24-29.93
linux-image-2.6.24-29-server - 2.6.24-29.93
linux-image-2.6.24-29-sparc64 - 2.6.24-29.93
linux-image-2.6.24-29-sparc64-smp - 2.6.24-29.93
linux-image-2.6.24-29-virtual - 2.6.24-29.93
linux-image-2.6.24-29-xen - 2.6.24-29.93

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

After a standard system update you need to reboot your computer to make all the necessary changes.

References