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The SUSE Linux Enterprise 12 SP3 kernel was updated to receive various security and bugfixes.
The following security bugs were fixed:
- CVE-2019-10638: In the Linux kernel, a device could be tracked by an attacker using the IP ID values the kernel produces for connection-less protocols (e.g., UDP and ICMP). When such traffic was sent to multiple destination IP addresses, it was possible to obtain hash collisions (of indices to the counter array) and thereby obtain the hashing key (via enumeration). An attack may have been conducted by hosting a crafted web page that uses WebRTC or gQUIC to force UDP traffic to attacker-controlled IP addresses (bnc#1140575 1140577). - CVE-2019-10639: The Linux kernel allowed Information Exposure (partial kernel address disclosure), that lead to a KASLR bypass. Specifically, it was possible to extract the KASLR kernel image offset using the IP ID values the kernel produces for connection-less protocols (e.g., UDP and ICMP). When such traffic is sent to multiple destination IP addresses, it was possible to obtain hash collisions (of indices to the counter array) and thereby obtain the hashing key (via enumeration). This key contains enough bits from a kernel address (of a static variable) so when the key is extracted (via enumeration), the offset of the kernel image is exposed. This attack could be carried out remotely, by the attacker forcing the target device to send UDP or ICMP (or certain other) traffic to attacker-controlled IP addresses. Forcing a server to send UDP traffic is trivial if the server is a DNS server. ICMP traffic is trivial if the server answers ICMP Echo requests (ping). For client targets, if the target visited the attacker's web page, then WebRTC or gQUIC could be used to force UDP traffic to attacker-controlled IP addresses. NOTE: this attack against KASLR became viable because IP ID generation was changed to have a dependency on an address associated with a network namespace (bnc#1140577). - CVE-2019-10126: A flaw was found in the Linux kernel. A heap based buffer overflow in mwifiex_uap_parse_tail_ies function in drivers/net/wireless/marvell/mwifiex/ie.c might have lead to memory corruption and possibly other consequences (bnc#1136935). - CVE-2018-20836: An issue was discovered in the Linux kernel There was a race condition in smp_task_timedout() and smp_task_done() in drivers/scsi/libsas/sas_expander.c, leading to a use-after-free (bnc#1134395). - CVE-2019-11599: The coredump implementation in the Linux kernel did not use locking or other mechanisms to prevent vma layout or vma flags changes while it ran, which allowed local users to obtain sensitive information, cause a denial of service, or possibly have unspecified other impact by triggering a race condition with mmget_not_zero or get_task_mm call. This is related to fs/userfaultfd.c, mm/mmap.c, fs/proc/task_mmu.c, and drivers/infiniband/core/uverbs_main.c (bnc#1131645 1133738). - CVE-2019-12614: An issue was discovered in dlpar_parse_cc_property in arch/powerpc/platforms/pseries/dlpar.c in the Linux kernel There was an unchecked kstrdup of prop-name, which might have allowed an attacker to cause a denial of service (NULL pointer dereference and system crash) (bnc#1137194). - CVE-2019-12819: An issue was discovered in the Linux kernel The function __mdiobus_register() in drivers/net/phy/mdio_bus.c calls put_device(), which would trigger a fixed_mdio_bus_init use-after-free. This would cause a denial of service (bnc#1138291). - CVE-2019-12818: An issue was discovered in the Linux kernel The nfc_llcp_build_tlv function in net/nfc/llcp_commands.c may return NULL. If the caller did not check for this, it would trigger a NULL pointer dereference. This would cause a denial of service. This affected nfc_llcp_build_gb in net/nfc/llcp_core.c (bnc#1138293). - CVE-2019-12456: A double-fetch bug in _ctl_ioctl_main() could lead to a local denial of service attack (bsc#1136922 CVE-2019-12456). - CVE-2019-12380: An issue was discovered in the efi subsystem in the Linux kernel phys_efi_set_virtual_address_map in arch/x86/platform/efi/efi.c and efi_call_phys_prolog in arch/x86/platform/efi/efi_64.c mishandle memory allocation failures. NOTE: This id is disputed as not being an issue because ;All the code touched by the referenced commit runs only at boot, before any user processes are started. Therefore, there is no possibility for an unprivileged user to control it (bnc#1136598). - CVE-2019-11487: The Linux kernel before allowed page-_refcount reference count overflow, with resultant use-after-free issues, if about 140 GiB of RAM exists. This is related to fs/fuse/dev.c, fs/pipe.c, fs/splice.c, include/linux/mm.h, include/linux/pipe_fs_i.h, kernel/trace/trace.c, mm/gup.c, and mm/hugetlb.c. It could occur with FUSE requests (bnc#1133190 1133191).
The following non-security bugs were fixed:
- Drop multiversion(kernel) from the KMP template (bsc#1127155). - Fix ixgbe backport (bsc#1133140) - Revert 'KMPs: obsolete older KMPs of the same flavour (bsc#1127155, bsc#1109137).' This reverts commit 4cc83da426b53d47f1fde9328112364eab1e9a19. - Update 'TCP SACK Panic' series - ACPI / CPPC: Check for valid PCC subspace only if PCC is used (bsc#1126961). - ACPI / CPPC: Fix KASAN global out of bounds warning (bsc#1126961). - ACPI / CPPC: Make CPPC ACPI driver aware of PCC subspace IDs (bsc#1126961). - ACPI / CPPC: Update all pr_(debug/err) messages to log the susbspace id (bsc#1126961). - ACPI / CPPC: Use 64-bit arithmetic instead of 32-bit (bsc#1126961). - ACPI / CPPC: fix build issue with ktime_t used in logical operation (bsc#1126961). - ACPI: CPPC: remove initial assignment of pcc_ss_data (bsc#1126961). - at76c50x-usb: Do not register led_trigger if usb_register_driver failed (bsc#1135642). - ath6kl: Only use match sets when firmware supports it (bsc#1120902). - btrfs: check for refs on snapshot delete resume (bsc#1131335, bsc#1137004). - btrfs: run delayed items before dropping the snapshot (bsc#1121263, bsc#1111188, bsc#1137004). - btrfs: save drop_progress if we drop refs at all (bsc#1131336, bsc#1137004). - ceph: fix potential use-after-free in ceph_mdsc_build_path (bsc#1138681). - ceph: flush dirty inodes before proceeding with remount (bsc#1138681). - ceph: print inode number in __caps_issued_mask debugging messages (bsc#1138681). - cpu/hotplug: Provide cpus_read|write_[un]lock() (bsc#1138374, LTC#178199). - cpu/hotplug: Provide lockdep_assert_cpus_held() (bsc#1138374, LTC#178199). - cpufreq / CPPC: Add cpuinfo_cur_freq support for CPPC (bsc#1126961). - cpufreq: CPPC: fix build in absence of v3 support (bsc#1126961). - cpufreq: Replace 'max_transition_latency' with 'dynamic_switching' (bsc#1126961). - cpufreq: cn99xx: set platform specific sampling rate (bsc#1126961). - ibmvnic: Add device identification to requested IRQs (bsc#1137739). - ibmvnic: Do not close unopened driver during reset (bsc#1137752). - ibmvnic: Fix unchecked return codes of memory allocations (bsc#1137752). - ibmvnic: Refresh device multicast list after reset (bsc#1137752). - ibmvnic: remove set but not used variable 'netdev' (bsc#1137739). - iwiwifi: fix bad monitor buffer register addresses (bsc#1129770). - kabi: cpufreq: rename dynamic_switching to max_transition_latency (bsc#1126961). - kernel/sys.c: prctl: fix false positive in validate_prctl_map() (bsc#1137749). - libertas_tf: prevent underflow in process_cmdrequest() (bsc#1119086). - mailbox: PCC: Move the MAX_PCC_SUBSPACES definition to header file (bsc#1126961). - mailbox: pcc: Drop uninformative output during boot (bsc#1126961). - mailbox: pcc: Fix crash when request PCC channel 0 (bsc#1126961). - mwl8k: Fix rate_idx underflow (bsc#1135642). - net/ibmvnic: Remove tests of member address (bsc#1137739). - net: Remove NO_IRQ from powerpc-only network drivers (bsc#1137739). - nvmet-fc: bring Disconnect into compliance with FC-NVME spec (bsc#1136889). - nvmet-fc: fix issues with targetport assoc_list list walking (bsc#1136889). - nvmet: fix fatal_err_work deadlock (bsc#1136889). - nvmet_fc: support target port removal with nvmet layer (bsc#1136889). - powerpc/cacheinfo: add cacheinfo_teardown, cacheinfo_rebuild (bsc#1138374, LTC#178199). - powerpc/eeh: Fix race with driver un/bind (bsc#1066223). - powerpc/perf: Add blacklisted events for Power9 DD2.1 (bsc#1053043). - powerpc/perf: Add blacklisted events for Power9 DD2.2 (bsc#1053043). - powerpc/perf: Fix MMCRA corruption by bhrb_filter (bsc#1053043). - powerpc/perf: Infrastructure to support addition of blacklisted events (bsc#1053043). - powerpc/process: Fix sparse address space warnings (bsc#1066223). - powerpc/pseries/mobility: prevent cpu hotplug during DT update (bsc#1138374, LTC#178199). - powerpc/pseries/mobility: rebuild cacheinfo hierarchy post-migration (bsc#1138374, LTC#178199). - rtlwifi: fix false rates in _rtl8821ae_mrate_idx_to_arfr_id() (bsc#1120902). - scsi: core: add new RDAC LENOVO/DE_Series device (bsc#1132390). - scsi: qla2xxx: Fix FC-AL connection target discovery (bsc#1094555). - scsi: qla2xxx: Fix N2N target discovery with Local loop (bsc#1094555). - signals: avoid random wakeups in sigsuspend() (bsc#1137915) - treewide: Use DEVICE_ATTR_WO (bsc#1137739). - x86/entry/64/compat: Fix stack switching for XEN PV (bsc#1108382).
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