SB2021122105 - Multiple vulnerabilities in Mozilla Thunderbird

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2021122105

SB2021122105 - Multiple vulnerabilities in Mozilla Thunderbird

Published: December 21, 2021

Security Bulletin ID SB2021122105
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Buffer overflow (CVE-ID: CVE-2021-44538)

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to a boundary error within the olm_session_describe() function in libolm. A remote attacker send specially crafted messages to the application that is using the affected library, trigger buffer overflow and perform a denial of service (DoS) attack


2) Insufficient UI Warning of Dangerous Operations (CVE-ID: CVE-2021-4126)

The vulnerability allows a remote attacker to perform spoofing attacks.

The vulnerability exists in the way Thunderbird handles signed email messages. When receiving an OpenPGP/MIME signed email message that contains an additional outer MIME message layer, for example a message footer added by a mailing list gateway, Thunderbird only considered the inner signed message for the signature validity. This gave the false impression that the additional contents were also covered by the digital signature.


Remediation

Install update from vendor's website.

References