Advisories ยป MGASA-2014-0227

Updated kernel-rt packages fix multiple vulnerabilities

Publication date: 19 May 2014
Modification date: 19 May 2014
Type: security
Affected Mageia releases : 4
CVE: CVE-2014-0155 , CVE-2014-0196 , CVE-2014-1737 , CVE-2014-1738

Description

Updated kernel-rt 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)

The -rt patch has been updated to rt30.

For other fixes, see the referenced changelogs.

References

SRPMS

4/core