Vulnerability Name:

CVE-2017-18200 (CCN-139515)

Assigned:2017-10-03
Published:2017-10-03
Updated:2018-03-16
Summary:The f2fs implementation in the Linux kernel before 4.14 mishandles reference counts associated with f2fs_wait_discard_bios calls, which allows local users to cause a denial of service (BUG), as demonstrated by fstrim.
CVSS v3 Severity:5.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
4.8 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/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): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
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:4.9 Medium (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
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
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-20
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2017-18200

Source: CONFIRM
Type: Patch, Third Party Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=638164a2718f337ea224b747cf5977ef143166a4

Source: XF
Type: UNKNOWN
linux-kernel-cve201718200-dos(139515)

Source: CCN
Type: Linux Kernel GIT Repository
f2fs: fix potential panic during fstrim

Source: CONFIRM
Type: Patch, Third Party Advisory
https://github.com/torvalds/linux/commit/638164a2718f337ea224b747cf5977ef143166a4

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2017-18200

Vulnerable Configuration:Configuration 1:
  • cpe:/o:linux:linux_kernel:*:*:*:*:*:*:*:* (Version <= 4.13)

    • Configuration CCN 1:
  • cpe:/o:linux:linux_kernel:4.13.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.xenial:def:2017182000000000
    V
    		CVE-2017-18200 on Ubuntu 16.04 LTS (xenial) - medium.
    2018-02-26
    oval:com.ubuntu.artful:def:201718200000
    V
    		CVE-2017-18200 on Ubuntu 17.10 (artful) - medium.
    2018-02-25
    oval:com.ubuntu.trusty:def:201718200000
    V
    		CVE-2017-18200 on Ubuntu 14.04 LTS (trusty) - medium.
    2018-02-25
    oval:com.ubuntu.xenial:def:201718200000
    V
    		CVE-2017-18200 on Ubuntu 16.04 LTS (xenial) - medium.
    2018-02-25
    BACK
    linux linux kernel *
    linux linux kernel 4.13.0