Vulnerability Name:

CVE-2017-5546 (CCN-121662)

Assigned:2017-02-06
Published:2017-02-06
Updated:2019-10-03
Summary:The freelist-randomization feature in mm/slab.c in the Linux kernel 4.8.x and 4.9.x before 4.9.5 allows local users to cause a denial of service (duplicate freelist entries and system crash) or possibly have unspecified other impact in opportunistic circumstances by leveraging the selection of a large value for a random number.
CVSS v3 Severity:7.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
6.8 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/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
6.2 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
5.4 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
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
4.9 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-noinfo
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2017-5546

Source: CCN
Type: Linux Kernel GIT Repository
mm/slab.c: fix SLAB freelist randomization duplicate entries

Source: CONFIRM
Type: Issue Tracking, Patch, Third Party Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c4e490cf148e85ead0d1b1c2caaba833f1d5b29f

Source: CONFIRM
Type: Release Notes, Vendor Advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.5

Source: CCN
Type: oss-sec Mailing List, Fri, 20 Jan 2017 22:24:00 -0500
Re: CVE REQUEST: linux kernel: process with pgid zero able to crash kernel

Source: MLIST
Type: Mailing List, Patch, Third Party Advisory
[oss-security] 20170120 Re: CVE REQUEST: linux kernel: process with pgid zero able to crash kernel

Source: BID
Type: Third Party Advisory, VDB Entry
95711

Source: CCN
Type: BID-95711
Linux Kernel CVE-2017-5546 Local Denial of Service Vulnerability

Source: CONFIRM
Type: Issue Tracking, Patch
https://bugzilla.redhat.com/show_bug.cgi?id=1415733

Source: XF
Type: UNKNOWN
linux-kernel-cve20175546-dos(121662)

Source: CONFIRM
Type: Issue Tracking, Patch, Third Party Advisory
https://github.com/torvalds/linux/commit/c4e490cf148e85ead0d1b1c2caaba833f1d5b29f

Vulnerable Configuration:Configuration 1:
  • cpe:/o:linux:linux_kernel:4.8:-:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:4.8.1:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:4.8.2:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:4.8.3:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:4.8.4:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:4.8.5:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:4.8.6:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:4.8.7:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:4.8.8:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:4.8.9:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:4.8.10:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:4.8.11:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:4.8.12:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:4.8.13:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:4.8.14:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:4.8.15:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:4.8.16:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:4.8.17:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:4.9:-:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:4.9.1:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:4.9.2:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:4.9.3:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:4.9.4:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/o:linux:linux_kernel:*:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.precise:def:20175546000
    V
    		CVE-2017-5546 on Ubuntu 12.04 LTS (precise) - low.
    2017-02-06
    oval:com.ubuntu.trusty:def:20175546000
    V
    		CVE-2017-5546 on Ubuntu 14.04 LTS (trusty) - low.
    2017-02-06
    oval:com.ubuntu.xenial:def:20175546000
    V
    		CVE-2017-5546 on Ubuntu 16.04 LTS (xenial) - low.
    2017-02-06
    oval:com.ubuntu.xenial:def:201755460000000
    V
    		CVE-2017-5546 on Ubuntu 16.04 LTS (xenial) - low.
    2017-02-06
    BACK
    linux linux kernel 4.8
    linux linux kernel 4.8.1
    linux linux kernel 4.8.2
    linux linux kernel 4.8.3
    linux linux kernel 4.8.4
    linux linux kernel 4.8.5
    linux linux kernel 4.8.6
    linux linux kernel 4.8.7
    linux linux kernel 4.8.8
    linux linux kernel 4.8.9
    linux linux kernel 4.8.10
    linux linux kernel 4.8.11
    linux linux kernel 4.8.12
    linux linux kernel 4.8.13
    linux linux kernel 4.8.14
    linux linux kernel 4.8.15
    linux linux kernel 4.8.16
    linux linux kernel 4.8.17
    linux linux kernel 4.9
    linux linux kernel 4.9.1
    linux linux kernel 4.9.2
    linux linux kernel 4.9.3
    linux linux kernel 4.9.4
    linux linux kernel *