The implementation of certain splice_write file operations in the Linux kernel before 3.16 does not enforce a restriction on the maximum size of a single file which allows local users to cause a denial of service (system crash) or possibly have unspecified other impact via a crafted splice system call, as demonstrated by use of a file descriptor associated with an ext4 filesystem. This is proof of concept code that triggers the kernel panic.
7020e5cb8eb79147f24ae47ba61603cfdfc59462bdfbc98295dfc6b21c5a9a40Ubuntu Security Notice 2541-1 - The Linux kernel's splice system call did not correctly validate its parameters. A local, unprivileged user could exploit this flaw to cause a denial of service (system crash). A flaw was discovered in how Thread Local Storage (TLS) is handled by the task switching function in the Linux kernel for x86_64 based machines. A local user could exploit this flaw to bypass the Address Space Layout Randomization (ASLR) protection mechanism. Various other issues were also addressed.
2d7e5b61dc25c61afcef553473cababbdf6689f4edd43072e65e8a190d46291bUbuntu Security Notice 2544-1 - Eric Windisch discovered flaw in how the Linux kernel's XFS file system replaces remote attributes. A local access with access to an XFS file system could exploit this flaw to escalate their privileges. A flaw was discovered in the automatic loading of modules in the crypto subsystem of the Linux kernel. A local user could exploit this flaw to load installed kernel modules, increasing the attack surface and potentially using this to gain administrative privileges. Various other issues were also addressed.
9ddf124b2f1631a25b55a6630565e4ec8e300e7cba350a78679c54da8bfe363cUbuntu Security Notice 2543-1 - Eric Windisch discovered flaw in how the Linux kernel's XFS file system replaces remote attributes. A local access with access to an XFS file system could exploit this flaw to escalate their privileges. A flaw was discovered in the automatic loading of modules in the crypto subsystem of the Linux kernel. A local user could exploit this flaw to load installed kernel modules, increasing the attack surface and potentially using this to gain administrative privileges. Various other issues were also addressed.
1d20f0a45ef3c2328018fdfae24660ad9d7b3abed4e42067fe621154e5dc00f9Ubuntu Security Notice 2542-1 - The Linux kernel's splice system call did not correctly validate its parameters. A local, unprivileged user could exploit this flaw to cause a denial of service (system crash). A flaw was discovered in how Thread Local Storage (TLS) is handled by the task switching function in the Linux kernel for x86_64 based machines. A local user could exploit this flaw to bypass the Address Space Layout Randomization (ASLR) protection mechanism. Various other issues were also addressed.
6d16a19b701a03e7e17da5f559a14199c6b398ae3799e95bf7de7f4747bb2efeRed Hat Security Advisory 2015-0694-01 - The kernel-rt packages contain the Linux kernel, the core of any Linux operating system. A flaw was found in the way the Linux kernel's XFS file system handled replacing of remote attributes under certain conditions. A local user with access to XFS file system mount could potentially use this flaw to escalate their privileges on the system. A flaw was found in the way the Linux kernel's splice() system call validated its parameters. On certain file systems, a local, unprivileged user could use this flaw to write past the maximum file size, and thus crash the system.
0e711acf0df6e837643b849c9bb486ba31ff24ef22e412c4d7f4581de627ee57Red Hat Security Advisory 2015-0674-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. It was found that the Linux kernel's Infiniband subsystem did not properly sanitize input parameters while registering memory regions from user space via the verbs API. A local user with access to a /dev/infiniband/uverbsX device could use this flaw to crash the system or, potentially, escalate their privileges on the system. A flaw was found in the way the Linux kernel's splice() system call validated its parameters. On certain file systems, a local, unprivileged user could use this flaw to write past the maximum file size, and thus crash the system.
252d3a3f04735fff4c9e91df76c07d6a4f2fff78ef8e210b02cb32326371d925Debian Linux Security Advisory 3170-1 - Several vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service, information leaks or privilege escalation.
bd8c99b2ab449bf19ff881a59d02a9213bd109f150a9ca0142efa66f7d734b69Red Hat Security Advisory 2015-0164-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. A flaw was found in the way the Linux kernel's splice() system call validated its parameters. On certain file systems, a local, unprivileged user could use this flaw to write past the maximum file size, and thus crash the system.
87d55d169bb1eb75a6d8b03b0fd74309e51ddd4db35ed7adce2773bdbe95e460Red Hat Security Advisory 2015-0102-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. A flaw was found in the way the Linux kernel's SCTP implementation validated INIT chunks when performing Address Configuration Change. A remote attacker could use this flaw to crash the system by sending a specially crafted SCTP packet to trigger a NULL pointer dereference on the system. A race condition flaw was found in the way the Linux kernel's mmap, madvise, and fallocate system calls interacted with each other while operating on virtual memory file system files. A local user could use this flaw to cause a denial of service.
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