Vulnerability Name:

CVE-2016-9576

Assigned:2016-11-23
Published:2016-11-25
Updated:2018-01-04
Summary:The blk_rq_map_user_iov function in block/blk-map.c in the Linux kernel before 4.8.14 does not properly restrict the type of iterator, which allows local users to read or write to arbitrary kernel memory locations or cause a denial of service (use-after-free) by leveraging access to a /dev/sg device.
CVSS v3 Severity:7.8 High (CVSS v3 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
6.8 Medium (Temporal CVSS v3 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
7.8 High (CCN CVSS v3 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
6.8 Medium (CCN Temporal CVSS v3 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
7.0 High (REDHAT CVSS v3 Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H)
6.1 Medium (REDHAT Temporal CVSS v3 Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:7.2 High (CVSS v2 Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
6.8 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
6.2 Medium (REDHAT CVSS v2 Vector: AV:L/AC:H/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): High
Authentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-416
References:Source: CONFIRM
Type: VENDOR_ADVISORY
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a0ac402cfcdc904f9772e1762b3fda112dcc56a0

Source: SUSE
Type: UNKNOWN
openSUSE-SU-2016:3085

Source: SUSE
Type: UNKNOWN
openSUSE-SU-2016:3086

Source: SUSE
Type: UNKNOWN
openSUSE-SU-2016:3118

Source: SUSE
Type: UNKNOWN
SUSE-SU-2016:3146

Source: SUSE
Type: UNKNOWN
SUSE-SU-2016:3188

Source: SUSE
Type: UNKNOWN
SUSE-SU-2016:3203

Source: SUSE
Type: UNKNOWN
SUSE-SU-2016:3217

Source: SUSE
Type: UNKNOWN
SUSE-SU-2016:3248

Source: SUSE
Type: UNKNOWN
SUSE-SU-2016:3252

Source: REDHAT
Type: UNKNOWN
RHSA-2017:0817

Source: CONFIRM
Type: UNKNOWN
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.14

Source: MLIST
Type: PATCH
[oss-security] 20161209 Linux Kernel use-after-free in SCSI generic device interface

Source: BID
Type: UNKNOWN
94821

Source: REDHAT
Type: UNKNOWN
RHSA-2017:1842

Source: REDHAT
Type: UNKNOWN
RHSA-2017:2077

Source: REDHAT
Type: UNKNOWN
RHSA-2017:2669

Source: CONFIRM
Type: UNKNOWN
https://bugzilla.redhat.com/show_bug.cgi?id=1403145

Source: XF
Type: UNKNOWN
linux-kernel-cve20169576-dos(120245)

Source: CONFIRM
Type: VENDOR_ADVISORY
https://github.com/torvalds/linux/commit/a0ac402cfcdc904f9772e1762b3fda112dcc56a0

Vulnerable Configuration:Configuration 1:
  • cpe:/o:linux:linux_kernel:4.8.13:*:*:*:*:*:*:*

  • Configuration RedHat 1:
  • cpe:/o:redhat:enterprise_linux:6:*:*:*:*:*:*:*

  • Configuration RedHat 2:
  • cpe:/o:redhat:enterprise_linux:7:*:*:*:*:*:*:*

  • Configuration RedHat 3:
  • cpe:/a:redhat:rhel_extras_rt:7:*:*:*:*:*:*:*

  • Configuration CCN 1:
  • cpe:/o:linux:linux_kernel:4.8.13:*:*:*:*:*:*:*
  • AND
  • cpe:/o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
  • OR cpe:/o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
  • OR cpe:/o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*

  • Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:20169576
    V
    CVE-2016-9576
    2018-01-23
    oval:com.redhat.rhsa:def:20171842
    P
    RHSA-2017:1842: kernel security, bug fix, and enhancement update (Important)
    2017-08-01
    oval:com.redhat.rhsa:def:20172077
    P
    RHSA-2017:2077: kernel-rt security, bug fix, and enhancement update (Important)
    2017-08-01
    oval:com.redhat.rhsa:def:20170817
    P
    RHSA-2017:0817: kernel security, bug fix, and enhancement update (Moderate)
    2017-03-21
    oval:com.ubuntu.trusty:def:20169576000
    V
    CVE-2016-9576 on Ubuntu 14.04 LTS (trusty) - low.
    2016-12-28
    oval:com.ubuntu.xenial:def:20169576000
    V
    CVE-2016-9576 on Ubuntu 16.04 LTS (xenial) - low.
    2016-12-28
    oval:com.ubuntu.precise:def:20169576000
    V
    CVE-2016-9576 on Ubuntu 12.04 LTS (precise) - low.
    2016-12-28
    BACK
    linux linux_kernel 4.8.13
    redhat enterprise_linux 6
    redhat enterprise_linux 7
    redhat rhel_extras_rt 7