SB2019072004 - OpenSUSE Linux update for MozillaFirefox

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) Cache Attacks (CVE-ID: CVE-2018-12404)

The vulnerability allows a remote attacker to perform a downgrade attack on the server and decrypt private keys on the target system.

The vulnerability exists due to a core weakness in TLS that relates to the handshaking of the session key which is used within the tunnel during parallelisation of thousands of oracle queries that occurs using a cluster of TLS servers which share the same public key certificate. A remote attacker can mount a microarchitectural side channel attack against a vulnerable implementation, obtain a network man-in-the-middle position, obtain the relevant data to sign and trigger the victim server to decrypt ciphertexts chosen by the adversary to perform a downgrade attack.

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.

Remediation

Install update from vendor's website.

References

• https://lists.opensuse.org/opensuse-security-announce/2019-07/msg00021.html