Is CVE-2020-12398 in the CISA KEV catalog?

No. CVE-2020-12398 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-12398?

CVE-2020-12398 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2020-12398?

CVE-2020-12398 has an EPSS score of 0.98% (58th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-12398?

Upgrade thunderbird on debian 11 to 1:68.9.0-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2020-12398

HIGH

7.5

CVSS v3

NVD

Description

If Thunderbird is configured to use STARTTLS for an IMAP server, and the server sends a PREAUTH response, then Thunderbird will continue with an unencrypted connection, causing email data to be sent without protection. This vulnerability affects Thunderbird < 68.9.0.

CWE-319

How to fix

Remediation Available

thunderbirdDebian

Fixed in:1:68.9.0-1CVE-2020-12398

thunderbirdUbuntu

Fixed in:1:68.10.0+build1-0ubuntu0.16.04.1USN-4421-1

Fixed in:1:68.10.0+build1-0ubuntu0.18.04.1USN-4421-1

Fixed in:1:68.10.0+build1-0ubuntu0.20.04.1USN-4421-1

Mozilla Thunderbird (en-US)Windows application

Affected:68.9.0Fixed in:68.9.0Mozilla

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 InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.98%probability of exploitation in 30 days

58thpercentile

Moderate risk: more likely to be exploited than 58% of all known CVEs.

References

Vendor Advisory2

Third-Party Advisory1

usn.ubuntu.com

Related Vulnerabilities

Other CWE-319 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2018-12710	High	8.0	77%	-	-
CVE-2024-25735	Critical	9.1	51%	-	Fix
CVE-2019-3993	High	7.5	46%	-	-
CVE-2017-5259	High	8.8	39%	-	-
CVE-2016-5649	Critical	9.8	27%	-	-
CVE-2021-39341	High	8.2	23%	-	-

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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.