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osvGoogleOSV:DSA-3607-1
HistoryJun 28, 2016 - 12:00 a.m.

linux - security update

2016-06-2800:00:00
Google
osv.dev
21

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

10 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:C/I:C/A:C

0.024 Low

EPSS

Percentile

88.4%

Several vulnerabilities have been discovered in the Linux kernel that
may lead to a privilege escalation, denial of service or information
leaks.

  • CVE-2015-7515,
    CVE-2016-2184,
    CVE-2016-2185,
    CVE-2016-2186,
    CVE-2016-2187,
    CVE-2016-3136,
    CVE-2016-3137,
    CVE-2016-3138,
    CVE-2016-3140
    Ralf Spenneberg of OpenSource Security reported that various USB
    drivers do not sufficiently validate USB descriptors. This
    allowed a physically present user with a specially designed USB
    device to cause a denial of service (crash).
  • CVE-2016-0821
    Solar Designer noted that the list poisoning feature, intended
    to mitigate the effects of bugs in list manipulation in the
    kernel, used poison values within the range of virtual addresses
    that can be allocated by user processes.
  • CVE-2016-1237
    David Sinquin discovered that nfsd does not check permissions when
    setting ACLs, allowing users to grant themselves permissions to a
    file by setting the ACL.
  • CVE-2016-1583
    Jann Horn of Google Project Zero reported that the eCryptfs
    filesystem could be used together with the proc filesystem to
    cause a kernel stack overflow. If the ecryptfs-utils package is
    installed, local users could exploit this, via the
    mount.ecryptfs_private program, for denial of service (crash) or
    possibly for privilege escalation.
  • CVE-2016-2117
    Justin Yackoski of Cryptonite discovered that the Atheros L2
    ethernet driver incorrectly enables scatter/gather I/O. A remote
    attacker could take advantage of this flaw to obtain potentially
    sensitive information from kernel memory.
  • CVE-2016-2143
    Marcin Koscielnicki discovered that the fork implementation in the
    Linux kernel on s390 platforms mishandles the case of four
    page-table levels, which allows local users to cause a denial of
    service (system crash).
  • CVE-2016-3070
    Jan Stancek of Red Hat discovered a local denial of service
    vulnerability in AIO handling.
  • CVE-2016-3134
    The Google Project Zero team found that the netfilter subsystem does
    not sufficiently validate filter table entries. A user with the
    CAP_NET_ADMIN capability could use this for denial of service
    (crash) or possibly for privilege escalation. Debian disables
    unprivileged user namespaces by default, if locally enabled with the
    kernel.unprivileged_userns_clone sysctl, this allows privilege
    escalation.
  • CVE-2016-3156
    Solar Designer discovered that the IPv4 implementation in the Linux
    kernel did not perform the destruction of inet device objects
    properly. An attacker in a guest OS could use this to cause a denial
    of service (networking outage) in the host OS.
  • CVE-2016-3157 /
    XSA-171

Andy Lutomirski discovered that the x86_64 (amd64) task switching
implementation did not correctly update the I/O permission level
when running as a Xen paravirtual (PV) guest. In some
configurations this would allow local users to cause a denial of
service (crash) or to escalate their privileges within the guest.

  • CVE-2016-3672
    Hector Marco and Ismael Ripoll noted that it was possible to disable
    Address Space Layout Randomisation (ASLR) for x86_32 (i386) programs
    by removing the stack resource limit. This made it easier for local
    users to exploit security flaws in programs that have the setuid or
    setgid flag set.
  • CVE-2016-3951
    It was discovered that the cdc_ncm driver would free memory
    prematurely if certain errors occurred during its initialisation.
    This allowed a physically present user with a specially designed
    USB device to cause a denial of service (crash) or possibly to
    escalate their privileges.
  • CVE-2016-3955
    Ignat Korchagin reported that the usbip subsystem did not check
    the length of data received for a USB buffer. This allowed denial
    of service (crash) or privilege escalation on a system configured
    as a usbip client, by the usbip server or by an attacker able to
    impersonate it over the network. A system configured as a usbip
    server might be similarly vulnerable to physically present users.
  • CVE-2016-3961 /
    XSA-174

Vitaly Kuznetsov of Red Hat discovered that Linux allowed the use of
hugetlbfs on x86 (i386 and amd64) systems even when running as a Xen
paravirtualised (PV) guest, although Xen does not support huge
pages. This allowed users with access to /dev/hugepages to cause a
denial of service (crash) in the guest.

  • CVE-2016-4470
    David Howells of Red Hat discovered that a local user can trigger a
    flaw in the Linux kernel’s handling of key lookups in the keychain
    subsystem, leading to a denial of service (crash) or possibly to
    privilege escalation.
  • CVE-2016-4482,
    CVE-2016-4485,
    CVE-2016-4486,
    CVE-2016-4569,
    CVE-2016-4578,
    CVE-2016-4580,
    CVE-2016-5243,
    CVE-2016-5244
    Kangjie Lu reported that the USB devio, llc, rtnetlink, ALSA
    timer, x25, tipc, and rds facilities leaked information from the
    kernel stack.
  • CVE-2016-4565
    Jann Horn of Google Project Zero reported that various components
    in the InfiniBand stack implemented unusual semantics for the
    write() operation. On a system with InfiniBand drivers loaded,
    local users could use this for denial of service or privilege
    escalation.
  • CVE-2016-4581
    Tycho Andersen discovered that in some situations the Linux kernel
    did not handle propagated mounts correctly. A local user can take
    advantage of this flaw to cause a denial of service (system crash).
  • CVE-2016-4805
    Baozeng Ding discovered a use-after-free in the generic PPP layer in
    the Linux kernel. A local user can take advantage of this flaw to
    cause a denial of service (system crash), or potentially escalate
    their privileges.
  • CVE-2016-4913
    Al Viro found that the ISO9660 filesystem implementation did not
    correctly count the length of certain invalid name entries.
    Reading a directory containing such name entries would leak
    information from kernel memory. Users permitted to mount disks or
    disk images could use this to obtain sensitive information.
  • CVE-2016-4997 /
    CVE-2016-4998
    Jesse Hertz and Tim Newsham discovered that missing input sanitising
    in Netfilter socket handling may result in denial of service. Debian
    disables unprivileged user namespaces by default, if locally enabled
    with the kernel.unprivileged_userns_clone sysctl, this also allows
    privilege escalation.

For the stable distribution (jessie), these problems have been fixed in
version 3.16.7-ckt25-2+deb8u2.

We recommend that you upgrade your linux packages.

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

10 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:C/I:C/A:C

0.024 Low

EPSS

Percentile

88.4%