CVE-2020-26970

high
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

When reading SMTP server status codes, Thunderbird writes an integer value to a position on the stack that is intended to contain just one byte. Depending on processor architecture and stack layout, this leads to stack corruption that may be exploitable. This vulnerability affects Thunderbird < 78.5.1.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1677338

https://www.mozilla.org/security/advisories/mfsa2020-53/

Details

Source: MITRE

Published: 2020-12-09

Updated: 2020-12-10

Type: CWE-787

Risk Information

CVSS v2

Base Score: 9.3

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

Impact Score: 10

Exploitability Score: 8.6

Severity: HIGH

CVSS v3

Base Score: 8.8

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

Impact Score: 5.9

Exploitability Score: 2.8

Severity: HIGH

Vulnerable Software

Configuration 1

OR

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

Tenable Plugins

View all (18 total)

IDNameProductFamilySeverity
154529NewStart CGSL CORE 5.05 / MAIN 5.05 : thunderbird Multiple Vulnerabilities (NS-SA-2021-0172)NessusNewStart CGSL Local Security Checks
high
149335NewStart CGSL CORE 5.04 / MAIN 5.04 : thunderbird Multiple Vulnerabilities (NS-SA-2021-0025)NessusNewStart CGSL Local Security Checks
high
147286NewStart CGSL MAIN 6.02 : thunderbird Multiple Vulnerabilities (NS-SA-2021-0081)NessusNewStart CGSL Local Security Checks
high
145923CentOS 8 : thunderbird (CESA-2020:5398)NessusCentOS Local Security Checks
high
145221Ubuntu 20.10 : Thunderbird vulnerabilities (USN-4701-1)NessusUbuntu Local Security Checks
high
144512RHEL 8 : thunderbird (RHSA-2020:5644)NessusRed Hat Local Security Checks
high
144511RHEL 8 : thunderbird (RHSA-2020:5645)NessusRed Hat Local Security Checks
high
144214Scientific Linux Security Update : thunderbird on SL7.x x86_64 (2020:5400)NessusScientific Linux Local Security Checks
high
144212Oracle Linux 8 : thunderbird (ELSA-2020-5398)NessusOracle Linux Local Security Checks
high
144209Oracle Linux 7 : thunderbird (ELSA-2020-5400)NessusOracle Linux Local Security Checks
high
144205RHEL 7 : thunderbird (RHSA-2020:5400)NessusRed Hat Local Security Checks
high
144202RHEL 8 : thunderbird (RHSA-2020:5399)NessusRed Hat Local Security Checks
high
144113RHEL 8 : thunderbird (RHSA-2020:5398)NessusRed Hat Local Security Checks
high
143531GLSA-202012-04 : Mozilla Thunderbird: Multiple vulnerabilitiesNessusGentoo Local Security Checks
high
143527Debian DLA-2479-1 : thunderbird security updateNessusDebian Local Security Checks
high
143509Debian DSA-4802-1 : thunderbird - security updateNessusDebian Local Security Checks
high
143426Mozilla Thunderbird < 78.5.1NessusWindows
high
143425Mozilla Thunderbird < 78.5.1NessusMacOS X Local Security Checks
high