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[email protected]CVE-2021-23987

HistoryMar 31, 2021 - 2:15 p.m.

CVE-2021-23987

2021-03-3114:15:19

CWE-787

[email protected]

web.nvd.nist.gov

210

cve-2021-23987

mozilla

firefox

esr

memory safety

vulnerability

nvd

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

8.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

9.1

Confidence

High

EPSS

0.003

Percentile

67.8%

JSON

Mozilla developers and community members reported memory safety bugs present in Firefox 86 and Firefox ESR 78.8. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.9, Firefox < 87, and Thunderbird < 78.9.

Affected configurations

Vulners

NVD

Node

mozillafirefox_esrRange≤78.9

mozillafirefoxRange≤87

mozillathunderbirdRange≤78.9

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": "78.9",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  },
  {
    "product": "Firefox",
    "vendor": "Mozilla",
    "versions": [
      {
        "lessThan": "87",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  },
  {
    "product": "Thunderbird",
    "vendor": "Mozilla",
    "versions": [
      {
        "lessThan": "78.9",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]