Vulnerability CVE-2019-9806

Vulnerability Name:

CVE-2019-9806 (CCN-158420)

Assigned:

2019-03-19

Published:

2019-03-19

Updated:

2019-04-29

Summary:

A vulnerability exists during authorization prompting for FTP transaction where successive modal prompts are displayed and cannot be immediately dismissed. This allows for a denial of service (DOS) attack. This vulnerability affects Firefox < 66.

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:N/A:H)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/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): Network 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

6.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)
5.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)

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

CVSS v2 Severity:

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

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

6.8 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:C)

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

Vulnerability Type:

CWE-399

Vulnerability Consequences:

Denial of Service

References:

Source: MITRE
Type: CNA
CVE-2019-9806

Source: MISC
Type: Issue Tracking, Permissions Required, Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1525267

Source: XF
Type: UNKNOWN
firefox-cve20199806-dos(158420)

Source: CCN
Type: Mozilla Foundation Security Advisory 2019-07
Security vulnerabilities fixed in Firefox 66

Source: MISC
Type: Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-07/

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2019-9806

Vulnerable Configuration:

Configuration 1:

cpe:/a:mozilla:firefox:*:*:*:*:*:*:*:* (Version < 66.0)

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:org.opensuse.security:def:111899	P	MozillaFirefox-92.0-1.2 on GA media (Moderate)	2022-01-17
oval:org.opensuse.security:def:105476	P	MozillaFirefox-92.0-1.2 on GA media (Moderate)	2021-10-01
oval:com.ubuntu.disco:def:201998060000000	V	CVE-2019-9806 on Ubuntu 19.04 (disco) - low.	2019-04-26
oval:com.ubuntu.bionic:def:20199806000	V	CVE-2019-9806 on Ubuntu 18.04 LTS (bionic) - low.	2019-04-26
oval:com.ubuntu.cosmic:def:201998060000000	V	CVE-2019-9806 on Ubuntu 18.10 (cosmic) - low.	2019-04-26
oval:com.ubuntu.cosmic:def:20199806000	V	CVE-2019-9806 on Ubuntu 18.10 (cosmic) - low.	2019-04-26
oval:com.ubuntu.bionic:def:201998060000000	V	CVE-2019-9806 on Ubuntu 18.04 LTS (bionic) - low.	2019-04-26
oval:com.ubuntu.xenial:def:201998060000000	V	CVE-2019-9806 on Ubuntu 16.04 LTS (xenial) - low.	2019-04-26
oval:com.ubuntu.xenial:def:20199806000	V	CVE-2019-9806 on Ubuntu 16.04 LTS (xenial) - low.	2019-04-26
oval:com.ubuntu.trusty:def:20199806000	V	CVE-2019-9806 on Ubuntu 14.04 LTS (trusty) - low.	2019-03-20

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