SB2019021802 - Debian update for thunderbird
Published: February 18, 2019
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 6 secuirty vulnerabilities.
1) Use-after-free error (CVE-ID: CVE-2018-18356)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists due to use-after-free error in Skia when handling malicious input. A remote attacker can trick the victim into visiting a specially crafted website, trigger memory corruption and cause the browser to crash.
2) Use-after-free (CVE-ID: CVE-2018-18500)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error when HTML5 stream in concert with custom HTML elements. A remote attacker can create a specially crafted web page. trick the victim into visiting it, trigger use-after-free error and execute arbitrary code on the target system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
3) Buffer overflow (CVE-ID: CVE-2018-18501)
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 web page, trick the victim into visiting 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.
4) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2018-18505)
The vulnerability allows a remote attacker to bypass imposed sandbox restrictions.
The vulnerability exists within implementation of authentication process for Inter-process Communication (IPC). This authentication is insufficient for channels created after the IPC process is started, leading to the authentication not being correctly applied to later channels. A remote attacker can bypass sandbox restrictions through IPC channels due to lack of message validation in the listener process.
5) Spoofing attack (CVE-ID: CVE-2018-18509)
The vulnerability allows a remote attacker to conduct spoofing attack.
The vulnerability exists due to a flaw during verification of certain S/MIME signatures causes emails can be shown in Thunderbird as having a valid digital signature, even if the shown message contents aren't covered by the signature. A remote attacker can reuse a valid S/MIME signature to craft an email message with arbitrary content.
6) Integer overflow (CVE-ID: CVE-2019-5785)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to integer overflow in the Skia library. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger integer overflow 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.