Vulnerability CVE-2019-18887

Vulnerability Name:

CVE-2019-18887 (CCN-171861)

Assigned:

2019-11-13

Published:

2019-11-13

Updated:

2020-08-24

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. The UriSigner was subject to timing attacks. This is related to symfony/http-kernel.

CVSS v3 Severity:

8.1 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
7.1 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): High Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
6.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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): High Integrity (I): None Availibility (A): None

CVSS v2 Severity:

6.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Medium Authentication (Au): None
Impact Metrics:	Confidentiality (C): Partial Integrity (I): Partial Availibility (A): Partial

7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:C/I:N/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): Complete Integrity (I): None Availibility (A): None

Vulnerability Type:

CWE-203

Vulnerability Consequences:

Obtain Information

References:

Source: MITRE
Type: CNA
CVE-2019-18887

Source: XF
Type: UNKNOWN
symfony-cve201918887-info-disc(171861)

Source: CCN
Type: symfony GIT Repository
[HttpKernel] Use constant time comparison in UriSigner

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-2019-18887-use-constant-time-comparison-in-urisigner

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

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2019-18887

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 ID	Class	Title	Last Modified
oval:com.ubuntu.disco:def:2019188870000000	V	CVE-2019-18887 on Ubuntu 19.04 (disco) - medium.	2019-11-21
oval:com.ubuntu.bionic:def:2019188870000000	V	CVE-2019-18887 on Ubuntu 18.04 LTS (bionic) - medium.	2019-11-21
oval:com.ubuntu.xenial:def:2019188870000000	V	CVE-2019-18887 on Ubuntu 16.04 LTS (xenial) - medium.	2019-11-21

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