Vulnerability Name:

CVE-2018-5143 (CCN-140256)

Assigned:2018-03-13
Published:2018-03-13
Updated:2018-08-02
Summary:URLs using "javascript:" have the protocol removed when pasted into the addressbar to protect users from cross-site scripting (XSS) attacks, but if a tab character is embedded in the "javascript:" URL the protocol is not removed and the script will execute. This could allow users to be socially engineered to run an XSS attack against themselves. This vulnerability affects Firefox < 59.
CVSS v3 Severity:6.1 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)
5.8 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:H/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): Changed
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): None
6.1 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)
5.8 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:H/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): Changed
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
5.5 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:P/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-79
Vulnerability Consequences:Cross-Site Scripting
References:Source: MITRE
Type: CNA
CVE-2018-5143

Source: BID
Type: Third Party Advisory, VDB Entry
103386

Source: CCN
Type: BID-103386
Mozilla Firefox MFSA2018-06 Multiple Security Vulnerabilities

Source: SECTRACK
Type: Third Party Advisory, VDB Entry
1040514

Source: CONFIRM
Type: Issue Tracking, Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1422643

Source: XF
Type: UNKNOWN
firefox-cve20185143-xss(140256)

Source: UBUNTU
Type: Third Party Advisory
USN-3596-1

Source: CCN
Type: Mozilla Foundation Security Advisory 2018-06
Security vulnerabilities fixed in Firefox 59

Source: CONFIRM
Type: Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2018-06/

Vulnerable Configuration:Configuration 1:
  • cpe:/a:mozilla:firefox:*:*:*:*:*:*:*:* (Version < 59.0)

    • Configuration 2:
  • cpe:/o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
  • OR cpe:/o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
  • OR cpe:/o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:mozilla:firefox:58.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:20185143
    V
    		CVE-2018-5143
    2022-06-30
    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.artful:def:20185143000
    V
    		CVE-2018-5143 on Ubuntu 17.10 (artful) - low.
    2018-06-11
    oval:com.ubuntu.bionic:def:20185143000
    V
    		CVE-2018-5143 on Ubuntu 18.04 LTS (bionic) - low.
    2018-06-11
    oval:com.ubuntu.bionic:def:201851430000000
    V
    		CVE-2018-5143 on Ubuntu 18.04 LTS (bionic) - low.
    2018-06-11
    oval:com.ubuntu.trusty:def:20185143000
    V
    		CVE-2018-5143 on Ubuntu 14.04 LTS (trusty) - low.
    2018-06-11
    oval:com.ubuntu.xenial:def:201851430000000
    V
    		CVE-2018-5143 on Ubuntu 16.04 LTS (xenial) - low.
    2018-06-11
    oval:com.ubuntu.xenial:def:20185143000
    V
    		CVE-2018-5143 on Ubuntu 16.04 LTS (xenial) - low.
    2018-06-11
    BACK
    mozilla firefox *
    canonical ubuntu linux 14.04
    canonical ubuntu linux 16.04
    canonical ubuntu linux 17.10
    mozilla firefox 58.0