From martin.pitt@canonical.com Fri Apr 1 03:20:41 2005 From: Martin Pitt To: ubuntu-security-announce@lists.ubuntu.com Cc: full-disclosure@lists.grok.org.uk, bugtraq@securityfocus.com Date: Fri, 1 Apr 2005 10:14:40 +0200 Subject: [Full-disclosure] [USN-103-1] Linux kernel vulnerabilities =========================================================== Ubuntu Security Notice USN-103-1 April 01, 2005 linux-source-2.6.8.1 vulnerabilities CAN-2005-0400, CAN-2005-0749, CAN-2005-0750, CAN-2005-0815, CAN-2005-0839 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 4.10 (Warty Warthog) The following packages are affected: linux-image-2.6.8.1-5-386 linux-image-2.6.8.1-5-686 linux-image-2.6.8.1-5-686-smp linux-image-2.6.8.1-5-amd64-generic linux-image-2.6.8.1-5-amd64-k8 linux-image-2.6.8.1-5-amd64-k8-smp linux-image-2.6.8.1-5-amd64-xeon linux-image-2.6.8.1-5-k7 linux-image-2.6.8.1-5-k7-smp linux-image-2.6.8.1-5-power3 linux-image-2.6.8.1-5-power3-smp linux-image-2.6.8.1-5-power4 linux-image-2.6.8.1-5-power4-smp linux-image-2.6.8.1-5-powerpc linux-image-2.6.8.1-5-powerpc-smp linux-patch-debian-2.6.8.1 The problem can be corrected by upgrading the affected package to version 2.6.8.1-16.13. You need to reboot the computer after doing a standard system upgrade to effect the necessary changes. Details follow: Mathieu Lafon discovered an information leak in the ext2 file system driver. When a new directory was created, the ext2 block written to disk was not initialized, so that previous memory contents (which could contain sensitive data like passwords) became visible on the raw device. This is particularly important if the target device is removable and thus can be read by users other than root. (CAN-2005-0400) Yichen Xie discovered a Denial of Service vulnerability in the ELF loader. A specially crafted ELF library or executable could cause an attempt to free an invalid pointer, which lead to a kernel crash. (CAN-2005-0749) Ilja van Sprundel discovered that the bluez_sock_create() function did not check its "protocol" argument for negative values. A local attacker could exploit this to execute arbitrary code with root privileges by creating a Bluetooth socket with a specially crafted protocol number. (CAN-2005-0750) Michal Zalewski discovered that the iso9660 file system driver fails to check ranges properly in several cases. Mounting a specially crafted CD-ROM may have caused a buffer overflow leading to a kernel crash or even arbitrary code execution. (CAN-2005-0815) Previous kernels did not restrict the use of the N_MOUSE line discipline in the serial driver. This allowed an unprivileged user to inject mouse movement and/or keystrokes (using the sunkbd driver) into the input subsystem, taking over the console or an X session, where another user is logged in. (CAN-2005-0839) A Denial of Service vulnerability was found in the tmpfs driver, which is commonly used to mount RAM disks below /dev/shm and /tmp. The shm_nopage() did not properly verify its address argument, which could be exploited by a local user to cause a kernel crash with invalid addresses. (http://linux.bkbits.net:8080/linux-2.6/cset@420551fbRlv9-QG6Gw9Lw_bKVfPSsg) Source archives: http://security.ubuntu.com/ubuntu/pool/main/l/linux-source-2.6.8.1/linux-source-2.6.8.1_2.6.8.1-16.13.diff.gz Size/MD5: 3141166 21bb3cb0cb3411b0fc6ed4b193cc5ade http://security.ubuntu.com/ubuntu/pool/main/l/linux-source-2.6.8.1/linux-source-2.6.8.1_2.6.8.1-16.13.dsc Size/MD5: 2121 c8109995552dbdf33155366c8b6ca574 http://security.ubuntu.com/ubuntu/pool/main/l/linux-source-2.6.8.1/linux-source-2.6.8.1_2.6.8.1.orig.tar.gz Size/MD5: 44728688 79730a3ad4773ba65fab65515369df84 Architecture independent packages: http://security.ubuntu.com/ubuntu/pool/main/l/linux-source-2.6.8.1/linux-doc-2.6.8.1_2.6.8.1-16.13_all.deb Size/MD5: 6156316 ced249a61a235b9954d1ae968e2cb7ca http://security.ubuntu.com/ubuntu/pool/main/l/linux-source-2.6.8.1/linux-patch-debian-2.6.8.1_2.6.8.1-16.13_all.deb Size/MD5: 1496926 406d8a710e1d9f95b0c8448962e3f4b7 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