SB2019082811 - Privilege escalation in MikroTik RouterOS

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Input validation error (CVE-ID: CVE-2019-15055)

The vulnerability allows a remote attacker to delete arbitrary files.

The vulnerability exists due to insufficient validation of the disk name. A remote authenticated attacker can reset credential storage, access to the management interface as an administrator without authentication and delete arbitrary files.

2) NULL pointer dereference (CVE-ID: N/A)

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

The vulnerability exists due to a NULL pointer dereference error in console process. A remote authenticated user can send a specially crafted packet and perform a denial of service (DoS) attack.

3) Reachable Assertion (CVE-ID: N/A)

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

The vulnerability exists due to a reachable assertion within the console process. A remote authenticated user can send a specially crafted packet and perform a denial of service attack.

Remediation

Install update from vendor's website.

References

• https://fortiguard.com/zeroday/FG-VD-19-108
• https://mikrotik.com/download/changelogs/testing-release-tree
• https://seclists.org/fulldisclosure/2020/Jan/12
• https://mikrotik.com/download/changelogs/long-term-release-tree