CVE-2019-6260 : What You Need to Know

CVE-2019-6260 was published on January 22, 2019, and involves vulnerabilities in the ASPEED ast2400 and ast2500 Baseband Management Controller (BMC) hardware and firmware. These vulnerabilities allow unauthorized access to the BMC's physical address space, potentially leading to security breaches.

Understanding CVE-2019-6260

This CVE affects the ASPEED ast2400 and ast2500 BMCs due to the presence of Advanced High-performance Bus (AHB) bridges that enable unrestricted reading and writing of the BMC's physical address space.

What is CVE-2019-6260?

The CVE pertains to specific scenarios involving various bridges within the BMC hardware that can be exploited to gain unauthorized access to the BMC's physical address space.

The Impact of CVE-2019-6260

The vulnerabilities in the AHB bridges of the ASPEED BMCs can allow malicious actors to gain control of the BMC from the host processor or, in rare cases, from the network if specific conditions are met.

Technical Details of CVE-2019-6260

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerabilities in the ASPEED ast2400 and ast2500 BMCs stem from the presence of AHB bridges that facilitate unauthorized access to the BMC's physical address space.

Affected Systems and Versions

Product: n/a
Vendor: n/a
Versions: n/a

Exploitation Mechanism

The specific scenarios that can be exploited include:

iLPC2AHB bridge Pt I
iLPC2AHB bridge Pt II
PCIe VGA P2A bridge
DMA from/to arbitrary BMC memory via X-DMA
UART-based SoC Debug interface
LPC2AHB bridge
PCIe BMC P2A bridge
Watchdog setup

Mitigation and Prevention

To address CVE-2019-6260, it is crucial to take immediate steps and implement long-term security practices.

Immediate Steps to Take

Disconnect BMC console uart from serial concentrators if not required
Implement network segmentation to restrict access to BMC
Monitor and log BMC access for unusual activities

Long-Term Security Practices

Regularly update BMC firmware to patch known vulnerabilities
Conduct security audits and penetration testing on BMC

Patching and Updates

Apply patches provided by ASPEED for the affected BMC models