CVE-2015-5283

The SUSE Linux Enterprise 12 kernel was updated to 3.12.48-52.27 to receive various security and bugfixes.

Following security bugs were fixed:

• CVE-2015-7613: A flaw was found in the Linux kernel IPC code that could lead to arbitrary code execution. The ipc_addid() function initialized a shared object that has unset uid/gid values. Since the fields are not initialized, the check can falsely succeed. (bsc#948536)
• CVE-2015-5156: When a guests KVM network devices is in a bridge configuration the kernel can create a situation in which packets are fragmented in an unexpected fashion. The GRO functionality can create a situation in which multiple SKB's are chained together in a single packets fraglist (by design). (bsc#940776)
• CVE-2015-5157: arch/x86/entry/entry_64.S in the Linux kernel before 4.1.6 on the x86_64 platform mishandles IRET faults in processing NMIs that occurred during userspace execution, which might allow local users to gain privileges by triggering an NMI (bsc#938706).
• CVE-2015-6252: A flaw was found in the way the Linux kernel's vhost driver treated userspace provided log file descriptor when processing the VHOST_SET_LOG_FD ioctl command. The file descriptor was never released and continued to consume kernel memory. A privileged local user with access to the /dev/vhost-net files could use this flaw to create a denial-of-service attack (bsc#942367).
• CVE-2015-5697: The get_bitmap_file function in drivers/md/md.c in the Linux kernel before 4.1.6 does not initialize a certain bitmap data structure, which allows local users to obtain sensitive information from kernel memory via a GET_BITMAP_FILE ioctl call. (bnc#939994)
• CVE-2015-6937: A NULL pointer dereference flaw was found in the Reliable Datagram Sockets (RDS) implementation allowing a local user to cause system DoS. A verification was missing that the underlying transport exists when a connection was created. (bsc#945825)
• CVE-2015-5283: A NULL pointer dereference flaw was found in SCTP implementation allowing a local user to cause system DoS. Creation of multiple sockets in parallel when system doesn't have SCTP module loaded can lead to kernel panic. (bsc#947155)

The following non-security bugs were fixed:

• ALSA: hda - Abort the probe without i915 binding for HSW/BDW (bsc#936556).
• Btrfs: Backport subvolume mount option handling (bsc#934962)
• Btrfs: Handle unaligned length in extent_same (bsc#937609).
• Btrfs: advertise which crc32c implementation is being used on mount (bsc#946057).
• Btrfs: allow mounting btrfs subvolumes with different ro/rw options.
• Btrfs: check if previous transaction aborted to avoid fs corruption (bnc#942509).
• Btrfs: clean up error handling in mount_subvol() (bsc#934962).
• Btrfs: cleanup orphans while looking up default subvolume (bsc#914818).
• Btrfs: do not update mtime/ctime on deduped inodes (bsc#937616).
• Btrfs: fail on mismatched subvol and subvolid mount options (bsc#934962).
• Btrfs: fix chunk allocation regression leading to transaction abort (bnc#938550).
• Btrfs: fix clone / extent-same deadlocks (bsc#937612).
• Btrfs: fix crash on close_ctree() if cleaner starts new transaction (bnc#938891).
• Btrfs: fix deadlock with extent-same and readpage (bsc#937612).
• Btrfs: fix file corruption after cloning inline extents (bnc#942512).
• Btrfs: fix file read corruption after extent cloning and fsync (bnc#946902).
• Btrfs: fix find_free_dev_extent() malfunction in case device tree has hole (bnc#938550).
• Btrfs: fix hang when failing to submit bio of directIO (bnc#942685).
• Btrfs: fix list transaction->pending_ordered corruption (bnc#938893).
• Btrfs: fix memory corruption on failure to submit bio for direct IO (bnc#942685).
• Btrfs: fix memory leak in the extent_same ioctl (bsc#937613).
• Btrfs: fix put dio bio twice when we submit dio bio fail (bnc#942685).
• Btrfs: fix race between balance and unused block group deletion (bnc#938892). -…

The SUSE Linux Enterprise 12 kernel was updated to 3.12.51 to receive various security and bugfixes.

Following security bugs were fixed:

• CVE-2015-7799: The slhc_init function in drivers/net/slip/slhc.c in the Linux kernel did not ensure that certain slot numbers were valid, which allowed local users to cause a denial of service (NULL pointer dereference and system crash) via a crafted PPPIOCSMAXCID ioctl call (bnc#949936).
• CVE-2015-5283: The sctp_init function in net/sctp/protocol.c in the Linux kernel had an incorrect sequence of protocol-initialization steps, which allowed local users to cause a denial of service (panic or memory corruption) by creating SCTP sockets before all of the steps have finished (bnc#947155).
• CVE-2015-2925: The prepend_path function in fs/dcache.c in the Linux kernel did not properly handle rename actions inside a bind mount, which allowed local users to bypass an intended container protection mechanism by renaming a directory, related to a 'double-chroot attack (bnc#926238).
• CVE-2015-8104: The KVM subsystem in the Linux kernel allowed guest OS users to cause a denial of service (host OS panic or hang) by triggering many #DB (aka Debug) exceptions, related to svm.c (bnc#954404).
• CVE-2015-5307: The KVM subsystem in the Linux kernel allowed guest OS users to cause a denial of service (host OS panic or hang) by triggering many #AC (aka Alignment Check) exceptions, related to svm.c and vmx.c (bnc#953527).
• CVE-2015-7990: RDS: There was no verification that an underlying transport exists when creating a connection, causing usage of a NULL pointer (bsc#952384).
• CVE-2015-7872: The key_gc_unused_keys function in security/keys/gc.c in the Linux kernel allowed local users to cause a denial of service (OOPS) via crafted keyctl commands (bnc#951440).
• CVE-2015-0272: Missing checks allowed remote attackers to cause a denial of service (IPv6 traffic disruption) via a crafted MTU value in an IPv6 Router Advertisement (RA) message, a different vulnerability than CVE-2015-8215 (bnc#944296).

The following non-security bugs were fixed:

• ALSA: hda - Disable 64bit address for Creative HDA controllers (bnc#814440).
• Add PCI IDs of Intel Sunrise Point-H SATA Controller S232/236 (bsc#953796).
• Btrfs: fix file corruption and data loss after cloning inline extents (bnc#956053).
• Btrfs: fix truncation of compressed and inlined extents (bnc#956053).
• Disable some ppc64le netfilter modules to restore the kabi (bsc#951546)
• Fix regression in NFSRDMA server (bsc#951110).
• KEYS: Fix race between key destruction and finding a keyring by name (bsc#951440).
• KVM: x86: call irq notifiers with directed EOI (bsc#950862).
• NVMe: Add shutdown timeout as module parameter (bnc#936076).
• NVMe: Mismatched host/device page size support (bsc#935961).
• PCI: Drop 'setting latency timer' messages (bsc#956047).
• SCSI: Fix hard lockup in scsi_remove_target() (bsc#944749).
• SCSI: hosts: update to use ida_simple for host_no (bsc#939926)
• SUNRPC: Fix oops when trace sunrpc_task events in nfs client (bnc#956703).
• Sync ppc64le netfilter config options with other archs (bnc#951546)
• Update kabi files with sbc_parse_cdb symbol change (bsc#954635).
• apparmor: allow SYS_CAP_RESOURCE to be sufficient to prlimit another task (bsc#921949).
• apparmor: temporary work around for bug while unloading policy (boo#941867).
• audit: correctly record file names with different path name types (bsc#950013).
• audit: create private file name copies when auditing inodes (bsc#950013).
• cpu: Defer smpboot kthread unparking until CPU known to scheduler (bsc#936773).
• dlm: make posix locks interruptible, (bsc#947241).
• dm sysfs: introduce ability to add writable attributes (bsc#904348).
• dm-snap: avoid deadock on s->lock when a read is split (bsc#939826).
• dm: do not start current request if it would've merged with the previous (bsc#904348).
• dm: impose configurable deadline for dm_request_fn's merge heuristic (bsc#904348).
• dmapi: Fix…

The sctp_init function in net/sctp/protocol.c in the Linux kernel before 4.2.3 has an incorrect sequence of protocol-initialization steps, which allows local users to cause a denial of service (panic or memory corruption) by creating SCTP sockets before all of the steps have finished.

It was discovered that the Linux kernel did not check if a new IPv6 MTU set by a user space application was valid. A remote attacker could forge a route advertisement with an invalid MTU that a user space daemon like NetworkManager would honor and apply to the kernel, causing a denial of service. (CVE-2015-0272)

It was discovered that in certain situations, a directory could be renamed outside of a bind mounted location. An attacker could use this to escape bind mount containment and gain access to sensitive information. (CVE-2015-2925)

Moein Ghasemzadeh discovered that the USB WhiteHEAT serial driver contained hardcoded attributes about the USB devices. An attacker could construct a fake WhiteHEAT USB device that, when inserted, causes a denial of service (system crash). (CVE-2015-5257)

It was discovered that the SCTP protocol implementation in the Linux kernel performed an incorrect sequence of protocol-initialization steps. A local attacker could use this to cause a denial of service (system crash). (CVE-2015-5283)

It was discovered that the SCTP protocol implementation in the Linux kernel performed an incorrect sequence of protocol-initialization steps. A local attacker could use this to cause a denial of service (system crash). (CVE-2015-5283)

Dmitry Vyukov discovered that the Linux kernel's keyring handler attempted to garbage collect incompletely instantiated keys. A local unprivileged attacker could use this to cause a denial of service (system crash). (CVE-2015-7872)

It was discovered that the SCTP protocol implementation in the Linux kernel performed an incorrect sequence of protocol-initialization steps. A local attacker could use this to cause a denial of service (system crash). (CVE-2015-5283)

Dmitry Vyukov discovered that the Linux kernel's keyring handler attempted to garbage collect incompletely instantiated keys. A local unprivileged attacker could use this to cause a denial of service (system crash). (CVE-2015-7872)