Is CVE-2021-23982 in the CISA KEV catalog?

No. CVE-2021-23982 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-23982?

CVE-2021-23982 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2021-23982?

CVE-2021-23982 has an EPSS score of 0.74% (50th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-23982?

Upgrade firefox on debian unstable to 87.0-1 or later. Fixes are available for 7 affected products.

CVE & CISA-KEV Catalog

CVE-2021-23982

MEDIUM

6.5

CVSS v3

NVD

Description

Using techniques that built on the slipstream research, a malicious webpage could have scanned both an internal network's hosts as well as services running on the user's local machine utilizing WebRTC connections. This vulnerability affects Firefox ESR < 78.9, Firefox < 87, and Thunderbird < 78.9.

CWE-326

How to fix

Remediation Available

firefoxDebian

Fixed in:87.0-1CVE-2021-23982

firefoxUbuntu

Fixed in:87.0+build3-0ubuntu0.16.04.2USN-4893-1

Fixed in:87.0+build3-0ubuntu0.18.04.2USN-4893-1

Fixed in:87.0+build3-0ubuntu0.20.04.2USN-4893-1

thunderbirdUbuntu

Fixed in:1:78.11.0+build1-0ubuntu0.18.04.2USN-4995-2

Fixed in:1:78.11.0+build1-0ubuntu0.20.04.2USN-4995-1

DeveloperEditionWindows application

Affected:87.0Fixed in:87.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:87.0Fixed in:87.0Mozilla

Mozilla Firefox ESR (en-US)Windows application

Affected:78.9Fixed in:78.9Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:78.9Fixed in:78.9Mozilla

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.74%probability of exploitation in 30 days

50thpercentile

Moderate risk: more likely to be exploited than 50% of all known CVEs.

References

Vendor Advisory4

Related Vulnerabilities

Other CWE-326 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0224	High	7.4	95%	-	Fix
CVE-2017-1000486	Critical	9.8	94%	KEV	Fix
CVE-2013-2566	Medium	5.9	84%	-	Fix
CVE-2017-11317	Critical	9.8	83%	KEV	-
CVE-2018-18325	High	7.5	74%	KEV	-
CVE-2018-15811	High	7.5	74%	KEV	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.