Vulnerability Name:

CVE-2020-12400 (CCN-186705)

Assigned:2020-07-28
Published:2020-07-28
Updated:2023-02-20
Summary:When converting coordinates from projective to affine, the modular inversion was not performed in constant time, resulting in a possible timing-based side channel attack. This vulnerability affects Firefox < 80 and Firefox for Android < 80.
CVSS v3 Severity:4.7 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N)
4.1 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): None
4.4 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N)
3.9 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): None
4.4 Medium (REDHAT CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N)
3.9 Low (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): None
CVSS v2 Severity:1.2 Low (CVSS v2 Vector: AV:L/AC:H/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): High
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
3.8 Low (CCN CVSS v2 Vector: AV:L/AC:H/Au:S/C:C/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): High
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): None
Availibility (A): None
Vulnerability Type:CWE-327
Vulnerability Consequences:Obtain Information
References:Source: MITRE
Type: CNA
CVE-2020-12400

Source: CCN
Type: USN-4455-1
NSS vulnerabilities

Source: security@mozilla.org
Type: Issue Tracking, Permissions Required, Vendor Advisory
security@mozilla.org

Source: CCN
Type: Red Hat Bugzilla – Bug 1853983
(CVE-2020-12400) - CVE-2020-12400 nss: P-384 and P-521 implementation uses a side-channel vulnerable modular inversion function

Source: CCN
Type: Bugzilla – Bug 1174763
CVE-2020-6829) VUL-0: CVE-2020-6829,CVE-2020-12400,CVE-2020-12401,CVE-2020-12403: mozilla-nss: Update to 3.55

Source: CCN
Type: Mozilla Web site
NSS 3.55 release notes

Source: XF
Type: UNKNOWN
mozilla-nss-cve202012400-info-disc(186705)

Source: security@mozilla.org
Type: UNKNOWN
security@mozilla.org

Source: CCN
Type: IBM Security Bulletin 6453115 (Cloud Pak for Security)
Cloud Pak for Security contains security vulnerabilities

Source: CCN
Type: Mozilla Foundation Security Advisory 2020-36
Security Vulnerabilities fixed in Firefox 80

Source: security@mozilla.org
Type: Vendor Advisory
security@mozilla.org

Source: security@mozilla.org
Type: Vendor Advisory
security@mozilla.org

Vulnerable Configuration:Configuration RedHat 1:
  • cpe:/a:redhat:enterprise_linux:8:*:*:*:*:*:*:*
    • Configuration RedHat 2:
  • cpe:/a:redhat:enterprise_linux:8::appstream:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:mozilla:network_security_services:3.54:*:*:*:*:*:*:*
  • AND
  • cpe:/a:ibm:cloud_pak_for_security:1.4.0.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:7591
    P
    		libfreebl3-3.79.4-150400.3.29.1 on GA media (Moderate)
    2023-06-12
    oval:org.opensuse.security:def:3006
    P
    		ant-1.9.4-3.3.1 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:94636
    P
    		libfreebl3-3.68.3-150400.1.7 on GA media (Moderate)
    2022-06-22
    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.redhat.rhsa:def:20210538
    P
    		RHSA-2021:0538: nss security and bug fix update (Moderate)
    2021-02-16
    oval:com.redhat.rhsa:def:20204076
    P
    		RHSA-2020:4076: nss and nspr security, bug fix, and enhancement update (Moderate)
    2020-09-29
    BACK
    mozilla network security services 3.54
    ibm cloud pak for security 1.4.0.0