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MozillaCVE-2021-43542

HistoryDec 08, 2021 - 10:15 p.m.

CVE-2021-43542

2021-12-0822:15:09

CWE-209

mozilla

web.nvd.nist.gov

166

cve-2021-43542

xmlhttprequest

thunderbird

firefox esr

firefox

security vulnerability

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

7.3

Confidence

High

EPSS

0.016

Percentile

87.5%

JSON

Using XMLHttpRequest, an attacker could have identified installed applications by probing error messages for loading external protocols. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.

Affected configurations

Nvd

Vulners

Node

mozillafirefoxRange<95.0

mozillafirefox_esrRange<91.4.0

mozillathunderbirdRange<91.4.0

Node

debiandebian_linuxMatch9.0

debiandebian_linuxMatch10.0

debiandebian_linuxMatch11.0

VendorProductVersionCPE
mozillafirefox*cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
mozillafirefox_esr*cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
mozillathunderbird*cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
debiandebian_linux9.0cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
debiandebian_linux10.0cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
debiandebian_linux11.0cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
mozilla	firefox	*	cpe:2.3:a:mozilla:firefox::::::::
mozilla	firefox_esr	*	cpe:2.3:a:mozilla:firefox_esr::::::::
mozilla	thunderbird	*	cpe:2.3:a:mozilla:thunderbird::::::::
debian	debian_linux	9.0	cpe:2.3:o:debian:debian_linux:9.0:::::::*
debian	debian_linux	10.0	cpe:2.3:o:debian:debian_linux:10.0:::::::*
debian	debian_linux	11.0	cpe:2.3:o:debian:debian_linux:11.0:::::::*

CNA Affected

[
  {
    "product": "Thunderbird",
    "vendor": "Mozilla",
    "versions": [
      {
        "lessThan": "91.4.0",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  },
  {
    "product": "Firefox ESR",
    "vendor": "Mozilla",
    "versions": [
      {
        "lessThan": "91.4.0",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  },
  {
    "product": "Firefox",
    "vendor": "Mozilla",
    "versions": [
      {
        "lessThan": "95",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]