CVE-2019-19648 : Security Advisory and Response

YARA 3.11.0 is affected by a vulnerability in the macho_parse_file function that can lead to a Denial of Service or potential code execution.

Understanding CVE-2019-19648

This CVE involves a vulnerability in YARA 3.11.0 that can be exploited to trigger memory access beyond allocated bounds.

What is CVE-2019-19648?

The command_size parameter in the macho_parse_file function of YARA 3.11.0 may have a different size than the actual size, allowing for memory access beyond allocated bounds.

The Impact of CVE-2019-19648

Exploiting this vulnerability can result in a Denial of Service (application crash) or potentially enable the execution of arbitrary code.

Technical Details of CVE-2019-19648

YARA 3.11.0 vulnerability details.

Vulnerability Description

The macho_parse_file function in YARA 3.11.0 can lead to out-of-bounds memory access due to inconsistencies in the command_size parameter.

Affected Systems and Versions

Product: YARA 3.11.0
Vendor: N/A
Version: N/A

Exploitation Mechanism

By crafting a MachO file with specific characteristics, attackers can trigger memory access beyond allocated bounds, potentially leading to a DoS or code execution.

Mitigation and Prevention

Protecting systems from CVE-2019-19648.

Immediate Steps to Take

Update YARA to a patched version if available.
Monitor for any unusual system behavior that could indicate exploitation.

Long-Term Security Practices

Regularly update software and security patches.
Implement proper input validation and boundary checks in applications.

Patching and Updates

Stay informed about security advisories and updates from YARA.