SB2021051710 - Multiple vulnerabilities in Mozilla Thunderbird

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Main Vulnerability Database SB2021051710

SB2021051710 - Multiple vulnerabilities in Mozilla Thunderbird

Published: May 17, 2021

Security Bulletin ID SB2021051710
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Protection Mechanism Failure (CVE-ID: CVE-2021-29957)

CWE-ID: CWE-693 - Protection Mechanism Failure

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to insufficient implementation of security measures. If a MIME encoded email contains an OpenPGP inline signed or encrypted message part, but also contains an additional unprotected part, Thunderbird did not indicate that only parts of the message are protected.


2) Cleartext storage of sensitive information (CVE-ID: CVE-2021-29956)

CWE-ID: CWE-312 - Cleartext Storage of Sensitive Information

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to OpenPGP secret keys that were imported using Thunderbird. were stored unencrypted on the user's local disk. The master password protection was inactive for those keys. A local user can gain access to sensitive information.


Remediation

Install update from vendor's website.

References