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=========================================================== Ubuntu Security Notice USN-509-1 August 31, 2007 linux-source-2.6.17 vulnerabilities CVE-2007-3104, CVE-2007-3105, CVE-2007-3513, CVE-2007-3848, CVE-2007-3851, CVE-2007-4308 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 6.10 This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu. The problem can be corrected by upgrading your system to the following package versions: Ubuntu 6.10: linux-image-2.6.17-12-386 2.6.17.1-12.40 linux-image-2.6.17-12-generic 2.6.17.1-12.40 linux-image-2.6.17-12-hppa32 2.6.17.1-12.40 linux-image-2.6.17-12-hppa64 2.6.17.1-12.40 linux-image-2.6.17-12-itanium 2.6.17.1-12.40 linux-image-2.6.17-12-mckinley 2.6.17.1-12.40 linux-image-2.6.17-12-powerpc 2.6.17.1-12.40 linux-image-2.6.17-12-powerpc-smp 2.6.17.1-12.40 linux-image-2.6.17-12-powerpc64-smp 2.6.17.1-12.40 linux-image-2.6.17-12-server 2.6.17.1-12.40 linux-image-2.6.17-12-server-bigiron 2.6.17.1-12.40 linux-image-2.6.17-12-sparc64 2.6.17.1-12.40 linux-image-2.6.17-12-sparc64-smp 2.6.17.1-12.40 After a standard system upgrade you need to reboot your computer to effect the necessary changes. Details follow: A flaw in the sysfs_readdir function allowed a local user to cause a denial of service by dereferencing a NULL pointer. (CVE-2007-3104) A buffer overflow was discovered in the random number generator. In environments with granular assignment of root privileges, a local attacker could gain additional privileges. (CVE-2007-3105) A flaw was discovered in the usblcd driver. A local attacker could cause large amounts of kernel memory consumption, leading to a denial of service. (CVE-2007-3513) It was discovered that certain setuid-root processes did not correctly reset process death signal handlers. A local user could manipulate this to send signals to processes they would not normally have access to. (CVE-2007-3848) The Direct Rendering Manager for the i915 driver could be made to write to arbitrary memory locations. An attacker with access to a running X11 session could send a specially crafted buffer and gain root privileges. (CVE-2007-3851) It was discovered that the aacraid SCSI driver did not correctly check permissions on certain ioctls. A local attacker could cause a denial of service or gain privileges. (CVE-2007-4308)