Vulnerability Name:

CVE-2020-6813 (CCN-177419)

Assigned:2020-03-10
Published:2020-03-10
Updated:2020-03-30
Summary:When protecting CSS blocks with the nonce feature of Content Security Policy, the @import statement in the CSS block could allow an attacker to inject arbitrary styles, bypassing the intent of the Content Security Policy. This vulnerability affects Firefox < 74.
CVSS v3 Severity:5.3 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
4.6 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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): Low
Availibility (A): None
6.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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:N/UI:R/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): Required
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-Other
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2020-6813

Source: MISC
Type: Permissions Required, Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1605814

Source: XF
Type: UNKNOWN
firefox-cve20206813-sec-bypass(177419)

Source: CCN
Type: IBM Security Bulletin 6190599 (Cloud App Management)
Multiple vulnerabilities in Mozilla Firefox affect IBM Cloud App Management

Source: CCN
Type: Mozilla Foundation Security Advisory 2020-08
Security Vulnerabilities fixed in Firefox 74

Source: MISC
Type: Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-08/

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2020-6813

Vulnerable Configuration:Configuration 1:
  • cpe:/a:mozilla:firefox:*:*:*:*:*:*:*:* (Version < 74.0)

    • Configuration CCN 1:
  • cpe:/a:ibm:cloud_app_management:2019.3.0:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:cloud_app_management:2019.4.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast 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.bionic:def:202068130000000
    V
    		CVE-2020-6813 on Ubuntu 18.04 LTS (bionic) - low.
    2020-03-11
    oval:com.ubuntu.xenial:def:202068130000000
    V
    		CVE-2020-6813 on Ubuntu 16.04 LTS (xenial) - low.
    2020-03-11
    BACK
    mozilla firefox *
    ibm cloud app management 2019.3.0
    ibm cloud app management 2019.4.0