Vulnerability Name:

CVE-2019-18888 (CCN-171862)

Assigned:2019-11-13
Published:2019-11-13
Updated:2021-07-21
Summary:An issue was discovered in Symfony 2.8.0 through 2.8.50, 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. If an application passes unvalidated user input as the file for which MIME type validation should occur, then arbitrary arguments are passed to the underlying file command. This is related to symfony/http-foundation (and symfony/mime in 4.3.x).
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
6.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N)
5.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
6.8 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): Complete
Availibility (A): None
Vulnerability Type:CWE-20
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2019-18888

Source: XF
Type: UNKNOWN
symfony-cve201918888-sec-bypass(171862)

Source: CCN
Type: symfony GIT Repository
[HttpFoundation] fix guessing mime-types of files with leading dash

Source: CONFIRM
Type: Release Notes
https://github.com/symfony/symfony/releases/tag/v4.3.8

Source: FEDORA
Type: Third Party Advisory
FEDORA-2019-9c2ad3b018

Source: FEDORA
Type: Third Party Advisory
FEDORA-2019-8b0ba02338

Source: FEDORA
Type: Third Party Advisory
FEDORA-2019-5ae4fd9203

Source: CCN
Type: BugTraq Mailing List, Mon, 18 Nov 2019 22:04:18 +0000
[SECURITY] [DSA 4573-1] symfony security update

Source: CONFIRM
Type: Vendor Advisory
https://symfony.com/blog/cve-2019-18888-prevent-argument-injection-in-a-mimetypeguesser

Source: CONFIRM
Type: Release Notes
https://symfony.com/blog/symfony-4-3-8-released

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2019-18888

Vulnerable Configuration:Configuration 1:
  • cpe:/a:sensiolabs:symfony:*:*:*:*:*:*:*:* (Version >= 2.8.0 and <= 2.8.50)
  • OR cpe:/a:sensiolabs:symfony:*:*:*:*:*:*:*:* (Version >= 3.4.0 and <= 3.4.34)
  • OR cpe:/a:sensiolabs:symfony:*:*:*:*:*:*:*:* (Version >= 4.2.0 and <= 4.2.11)
  • OR cpe:/a:sensiolabs:symfony:*:*:*:*:*:*:*:* (Version >= 4.3.0 and <= 4.3.7)

    • Configuration 2:
  • cpe:/o:fedoraproject:fedora:30:*:*:*:*:*:*:*
  • OR cpe:/o:fedoraproject:fedora:31:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:sensiolabs:symfony:2.8.0:*:*:*:*:*:*:*
  • OR cpe:/a:sensiolabs:symfony:3.4.0:*:*:*:*:*:*:*
  • OR cpe:/a:sensiolabs:symfony:4.2.0:-:*:*:*:*:*:*
  • OR cpe:/a:sensiolabs:symfony:2.8.51:*:*:*:*:*:*:*
  • OR cpe:/a:sensiolabs:symfony:3.4.34:*:*:*:*:*:*:*
  • OR cpe:/a:sensiolabs:symfony:4.2.11:*:*:*:*:*:*:*
  • OR cpe:/a:sensiolabs:symfony:4.3.0:-:*:*:*:*:*:*
  • OR cpe:/a:sensiolabs:symfony:4.3.7:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.disco:def:2019188880000000
    V
    		CVE-2019-18888 on Ubuntu 19.04 (disco) - medium.
    2019-11-21
    oval:com.ubuntu.bionic:def:2019188880000000
    V
    		CVE-2019-18888 on Ubuntu 18.04 LTS (bionic) - medium.
    2019-11-21
    oval:com.ubuntu.xenial:def:2019188880000000
    V
    		CVE-2019-18888 on Ubuntu 16.04 LTS (xenial) - medium.
    2019-11-21
    BACK
    sensiolabs symfony *
    sensiolabs symfony *
    sensiolabs symfony *
    sensiolabs symfony *
    fedoraproject fedora 30
    fedoraproject fedora 31
    sensiolabs symfony 2.8.0
    sensiolabs symfony 3.4.0
    sensiolabs symfony 4.2.0 -
    sensiolabs symfony 2.8.51
    sensiolabs symfony 3.4.34
    sensiolabs symfony 4.2.11
    sensiolabs symfony 4.3.0 -
    sensiolabs symfony 4.3.7