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Linux kernel multiple security vulnerabilities
updated since 11.08.2014
Published:18.08.2014
Source:
SecurityVulns ID:13914
Type:local
Threat Level:
7/10
Description:DoS via ptrace syscall, filesystems mount options limitation bypass.
Affected:LINUX : kernel 3.15
CVE:CVE-2014-5207 (fs/namespace.c in the Linux kernel through 3.16.1 does not properly restrict clearing MNT_NODEV, MNT_NOSUID, and MNT_NOEXEC and changing MNT_ATIME_MASK during a remount of a bind mount, which allows local users to gain privileges, interfere with backups and auditing on systems that had atime enabled, or cause a denial of service (excessive filesystem updating) on systems that had atime disabled via a "mount -o remount" command within a user namespace.)
 CVE-2014-5206 (The do_remount function in fs/namespace.c in the Linux kernel through 3.16.1 does not maintain the MNT_LOCK_READONLY bit across a remount of a bind mount, which allows local users to bypass an intended read-only restriction and defeat certain sandbox protection mechanisms via a "mount -o remount" command within a user namespace.)
 CVE-2014-4699 (The Linux kernel before 3.15.4 on Intel processors does not properly restrict use of a non-canonical value for the saved RIP address in the case of a system call that does not use IRET, which allows local users to leverage a race condition and gain privileges, or cause a denial of service (double fault), via a crafted application that makes ptrace and fork system calls.)
Original documentdocumentUBUNTU, [USN-2318-1] Linux kernel vulnerabilities (18.08.2014)
 documentUBUNTU, [USN-2274-1] Linux kernel vulnerability (11.08.2014)

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