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MozillaCVE-2020-12421

HistoryJul 09, 2020 - 3:15 p.m.

CVE-2020-12421

2020-07-0915:15:12

CWE-295

mozilla

web.nvd.nist.gov

190

cve-2020-12421

add-on updates

certificate chains

security vulnerability

firefox esr

firefox

thunderbird

nvd

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:N/I:P/A:N

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

AI Score

6.7

Confidence

High

EPSS

0.005

Percentile

76.8%

JSON

When performing add-on updates, certificate chains terminating in non-built-in-roots were rejected (even if they were legitimately added by an administrator.) This could have caused add-ons to become out-of-date silently without notification to the user. This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.

Affected configurations

Nvd

Vulners

Node

mozillafirefoxRange<78.0

mozillafirefox_esrRange<68.10.0

mozillathunderbirdRange<68.10.0

Node

canonicalubuntu_linuxMatch16.04esm

canonicalubuntu_linuxMatch18.04lts

canonicalubuntu_linuxMatch19.10

canonicalubuntu_linuxMatch20.04lts

VendorProductVersionCPE
mozillafirefox_esr*cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
mozillafirefox*cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
mozillathunderbird*cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
mozilla	firefox_esr	*	cpe:2.3:a:mozilla:firefox_esr::::::::
mozilla	firefox	*	cpe:2.3:a:mozilla:firefox::::::::
mozilla	thunderbird	*	cpe:2.3:a:mozilla:thunderbird::::::::

CNA Affected

[
  {
    "product": "Firefox ESR",
    "vendor": "Mozilla",
    "versions": [
      {
        "lessThan": "68.10",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  },
  {
    "product": "Firefox",
    "vendor": "Mozilla",
    "versions": [
      {
        "lessThan": "78",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  },
  {
    "product": "Thunderbird",
    "vendor": "Mozilla",
    "versions": [
      {
        "lessThan": "68.10.0",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]