Advisories ยป MGASA-2016-0005

Updated kernel packages fix security vulnerabilities

Publication date: 11 Jan 2016
Modification date: 11 Jan 2016
Type: security
Affected Mageia releases : 5
CVE: CVE-2015-6937 , CVE-2015-7872 , CVE-2015-7884 , CVE-2015-7885 , CVE-2015-8550 , CVE-2015-8551 , CVE-2015-8552 , CVE-2015-8660

Description

This kernel update is based on upstream 4.1.15 longterm kernel and fixes
the following security issues:

The __rds_conn_create function in net/rds/connection.c in the Linux kernel
through 4.2.3 allows local users to cause a denial of service (NULL pointer
dereference and system crash) or possibly have unspecified other impact by
using a socket that was not properly bound (CVE-2015-6937).

The key_gc_unused_keys function in security/keys/gc.c in the Linux kernel
through 4.2.6 allows local users to cause a denial of service (OOPS) via
crafted keyctl commands (CVE-2015-7872).

The vivid_fb_ioctl function in drivers/media/platform/vivid/vivid-osd.c in
the Linux kernel through 4.3.3 does not initialize a certain structure
member, which allows local users to obtain sensitive information from
kernel memory via a crafted application (CVE-2015-7884).

The dgnc_mgmt_ioctl function in drivers/staging/dgnc/dgnc_mgmt.c in the
Linux kernel through 4.3.3 does not initialize a certain structure member,
which allows local users to obtain sensitive information from kernel memory
via a crafted application (CVE-2015-7885).

Felix Wilhelm discovered a race condition in the Xen paravirtualized
drivers which can cause double fetch vulnerabilities. An attacker in the
paravirtualized guest could exploit this flaw to cause a denial of service
(crash the host) or potentially execute arbitrary code on the host
(CVE-2015-8550 / XSA-155).

Konrad Rzeszutek Wilk discovered the Xen PCI backend driver does not
perform sanity checks on the device's state. An attacker could exploit
this flaw to cause a denial of service (NULL dereference) on the host
(CVE-2015-8551 / XSA-157).

Konrad Rzeszutek Wilk discovered the Xen PCI backend driver does not
perform sanity checks on the device's state. An attacker could exploit
this flaw to cause a denial of service by flooding the logging system
with WARN() messages causing the initial domain to exhaust disk space
(CVE-2015-8552 / XSA-157).

The ovl_setattr function in fs/overlayfs/inode.c in the Linux kernel
through 4.3.3 attempts to merge distinct setattr operations, which allows
local users to bypass intended access restrictions and modify the
attributes of arbitrary overlay files via a crafted application
(CVE-2015-8660).

For other fixes in this update, see the referenced changelogs.

References

SRPMS

5/core

5/nonfree