CVE-2021-29969

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

If Thunderbird was configured to use STARTTLS for an IMAP connection, and an attacker injected IMAP server responses prior to the completion of the STARTTLS handshake, then Thunderbird didn't ignore the injected data. This could have resulted in Thunderbird showing incorrect information, for example the attacker could have tricked Thunderbird to show folders that didn't exist on the IMAP server. This vulnerability affects Thunderbird < 78.12.

References

https://www.mozilla.org/security/advisories/mfsa2021-30/

https://bugzilla.mozilla.org/show_bug.cgi?id=1682370

Details

Source: MITRE

Published: 2021-08-05

Updated: 2021-08-12

Type: CWE-552

Risk Information

CVSS v2

Base Score: 4.3

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

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 5.9

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

Impact Score: 3.6

Exploitability Score: 2.2

Severity: MEDIUM

Vulnerable Software

Configuration 1

OR

cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*

Tenable Plugins

View all (17 total)

IDNameProductFamilySeverity
153417Amazon Linux 2 : thunderbird (ALAS-2021-1709)NessusAmazon Linux Local Security Checks
high
152953Ubuntu 18.04 LTS / 20.04 LTS / 21.04 : Thunderbird vulnerabilities (USN-5058-1)NessusUbuntu Local Security Checks
high
152219openSUSE 15 Security Update : MozillaThunderbird (openSUSE-SU-2021:1091-1)NessusSuSE Local Security Checks
high
152168CentOS 8 : thunderbird (CESA-2021:2883)NessusCentOS Local Security Checks
high
152097RHEL 8 : thunderbird (RHSA-2021:2914)NessusRed Hat Local Security Checks
high
152095Oracle Linux 7 : thunderbird (ELSA-2021-2881)NessusOracle Linux Local Security Checks
high
152093Oracle Linux 8 : thunderbird (ELSA-2021-2883)NessusOracle Linux Local Security Checks
high
152086Scientific Linux Security Update : thunderbird on SL7.x x86_64 (2021:2881)NessusScientific Linux Local Security Checks
high
152077RHEL 8 : thunderbird (RHSA-2021:2882)NessusRed Hat Local Security Checks
high
152076RHEL 8 : thunderbird (RHSA-2021:2883)NessusRed Hat Local Security Checks
high
152074RHEL 7 : thunderbird (RHSA-2021:2881)NessusRed Hat Local Security Checks
high
152023SUSE SLED15 / SLES15 Security Update : MozillaThunderbird (SUSE-SU-2021:2458-1)NessusSuSE Local Security Checks
high
152010openSUSE 15 Security Update : MozillaThunderbird (openSUSE-SU-2021:2458-1)NessusSuSE Local Security Checks
high
151812Debian DLA-2711-1 : thunderbird - LTS security updateNessusDebian Local Security Checks
high
151807Debian DSA-4940-1 : thunderbird - security updateNessusDebian Local Security Checks
high
151613Mozilla Thunderbird < 78.12NessusWindows
high
151612Mozilla Thunderbird < 78.12NessusMacOS X Local Security Checks
high