MGASA-2014-0226

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MGASA-2014-0226

Summary: Updated kernel-linus packages fix multiple vulnerabilities

Details: Updated kernel-linus provides upstream 3.12.20 kernel and fixes the following security issues: The ioapic_deliver function in virt/kvm/ioapic.c in the Linux kernel through 3.14.1 does not properly validate the kvm_irq_delivery_to_apic return value, which allows guest OS users to cause a denial of service (host OS crash) via a crafted entry in the redirection table of an I/O APIC. NOTE: the affected code was moved to the ioapic_service function before the vulnerability was announced. (CVE-2014-0155) The n_tty_write function in drivers/tty/n_tty.c in the Linux kernel through 3.14.3 does not properly manage tty driver access in the "LECHO & !OPOST" case, which allows local users to cause a denial of service (memory corruption and system crash) or gain privileges by triggering a race condition involving read and write operations with long strings. (CVE-2014-0196) The raw_cmd_copyin function in drivers/block/floppy.c in the Linux kernel through 3.14.3 does not properly handle error conditions during processing of an FDRAWCMD ioctl call, which allows local users to trigger kfree operations and gain privileges by leveraging write access to a /dev/fd device. (CVE-2014-1737) The raw_cmd_copyout function in drivers/block/floppy.c in the Linux kernel through 3.14.3 does not properly restrict access to certain pointers during processing of an FDRAWCMD ioctl call, which allows local users to obtain sensitive information from kernel heap memory by leveraging write access to a /dev/fd device. (CVE-2014-1738) For other fixes, see the referenced changelogs.

References: https://advisories.mageia.org/MGASA-2014-0226.html, https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.20, https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.19, https://bugs.mageia.org/show_bug.cgi?id=13394