7.5

CVE-2020-12398: canonical ubuntu_linux

CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2020-12398DEBIAN-CVE-2020-12398
Published 09-07-2020Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-12398 is a high (CVSS 7.5) vulnerability in canonical ubuntu_linux. EPSS estimates a 0.98% chance of exploitation in the next 30 days, higher than 61.5% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.98%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 13 · Related 5
DLA-2247-1DSA-4702-1MGASA-2020-0300OPENSUSE-SU-2020:0799-1OPENSUSE-SU-2024:10601-1RHSA-2020:2611

Timeline

  1. 09-07-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.98%

Chance of exploitation in the next 30 days

Percentile

62%

Versus all other CVEs

30-day change

0.00 pp

From 0.98% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.98%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Canonical1 product
Debian1 product
  • thunderbird< 1:68.9.0-1
Mozilla1 product
Ubuntu1 product
  • thunderbird< 1:68.10.0+build1-0ubuntu0.16.04.1 | < 1:68.10.0+build1-0ubuntu0.18.04.1 | < 1:68.10.0+build1-0ubuntu0.20.04.1

4 vendors · 4 products

References

8 links