DSA-1800 linux-2.6 -- denial of service/privilege escalation/sensitive memory leak
|ID: oval:org.mitre.oval:def:8300||Date: (C)2009-12-15 (M)2018-02-19|
|Class: PATCH||Family: unix|
Several vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service, privilege escalation or a sensitive memory leak. The Common Vulnerabilities and Exposures project identifies the following problems: Chris Evans discovered a situation in which a child process can send an arbitrary signal to its parent. Roland McGrath discovered an issue on amd64 kernels that allows local users to circumvent system call audit configurations which filter based on the syscall numbers or argument details. Roland McGrath discovered an issue on amd64 kernels with CONFIG_SECCOMP enabled. By making a specially crafted syscall, local users can bypass access restrictions. Jiri Olsa discovered that a local user can cause a denial of service (system hang) using a SHM_INFO shmctl call on kernels compiled with CONFIG_SHMEM disabled. This issue does not affect prebuilt Debian kernels. Mikulas Patocka reported an issue in the console subsystem that allows a local user to cause memory corruption by selecting a small number of 3-byte UTF-8 characters. Igor Zhbanov reported that nfsd was not properly dropping CAP_MKNOD, allowing users to create device nodes on file systems exported with root_squash. Dan Carpenter reported a coding issue in the selinux subsystem that allows local users to bypass certain networking checks when running with compat_net=1. Shaohua Li reported an issue in the AGP subsystem they may allow local users to read sensitive kernel memory due to a leak of uninitialized memory. Benjamin Gilbert reported a local denial of service vulnerability in the KVM VMX implementation that allows local users to trigger an oops. Thomas Pollet reported an overflow in the af_rose implementation that allows remote attackers to retrieve uninitialized kernel memory that may contain sensitive data. Oleg Nesterov discovered an issue in the exit_notify function that allows local users to send an arbitrary signal to a process by running a program that modifies the exit_signal field and then uses an exec system call to launch a setuid application. Daniel Hokka Zakrisson discovered that a kill(-1) is permitted to reach processes outside of the current process namespace. Pavan Naregundi reported an issue in the CIFS filesystem code that allows remote users to overwrite memory via a long nativeFileSystem field in a Tree Connect response during mount.