SB2020021812 - OpenSUSE Linux update for MozillaThunderbird

Description

This security bulletin contains information about 7 secuirty vulnerabilities.

1) Use of insufficiently random values (CVE-ID: CVE-2020-6792)

The vulnerability allows an attacker to gain access to sensitive information.

The vulnerability exists due to an error in the message ID calculation processes that used uninitialized data in addition to the message contents.

2) Out-of-bounds read (CVE-ID: CVE-2020-6793)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition when processing email messages. A remote attacker can send a specially crafted email message to the victim, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system or crash the application.

3) Cleartext storage of sensitive information (CVE-ID: CVE-2020-6794)

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

The vulnerability exists due to an error password management functionality when working with master password that was updated after Thunderbird 60 release. The old password is still available unencrypted on the system, as Thunderbird did not delete the old password file after update.

4) NULL pointer dereference (CVE-ID: CVE-2020-6795)

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

The vulnerability exists due to a NULL pointer dereference error when processing messages with multiple S/MIME signatures. A remote attacker can send a specially crafted email message tho the victim and crash the application.

5) Improper access control (CVE-ID: CVE-2020-6797)

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions imposed on extensions that are granted downloads.open permission. A remote attacker can bypass implemented security restrictions and launch or open arbitrary application on the system.

Note: the vulnerability affects Mac OSX users only.

6) Code Injection (CVE-ID: CVE-2020-6798)

The vulnerability allows a remote attacker to execute arbitrary JavaScript code on the target system.

The vulnerability exists due to improper input validation when parsing template tag. A remote attacker can confuse the JavaScript parser into executing an arbitrary JavaScript send a specially crafted request and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

7) Memory corruption (CVE-ID: CVE-2020-6800)

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 website, 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.

References

• https://lists.opensuse.org/opensuse-security-announce/2020-02/msg00023.html