SB2021060722 - Red Hat Enterprise Linux 8.1 update for thunderbird
Published: June 7, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Cleartext storage of sensitive information (CVE-ID: CVE-2021-29956)
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.
2) Protection Mechanism Failure (CVE-ID: CVE-2021-29957)
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.
3) Buffer overflow (CVE-ID: CVE-2021-29967)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing HTML content. A remote attacker can create a specially crafted webpage, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.