CVE-2019-25048 : Security Advisory and Response

LibreSSL 2.9.1 through 3.2.1 has a heap-based buffer over-read vulnerability in the do_print_ex function, which is called from asn1_item_print_ctx and ASN1_item_print.

Understanding CVE-2019-25048

This CVE involves a specific vulnerability in LibreSSL versions 2.9.1 to 3.2.1.

What is CVE-2019-25048?

The vulnerability in LibreSSL allows for a heap-based buffer over-read in the do_print_ex function, leading to potential security risks.

The Impact of CVE-2019-25048

The vulnerability could be exploited by attackers to read sensitive information from the heap, potentially leading to information disclosure or further attacks.

Technical Details of CVE-2019-25048

This section provides more technical insights into the CVE.

Vulnerability Description

The issue arises due to a heap-based buffer over-read in the do_print_ex function, which is invoked from asn1_item_print_ctx and ASN1_item_print in LibreSSL versions 2.9.1 to 3.2.1.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions: 2.9.1 to 3.2.1

Exploitation Mechanism

Attackers can exploit this vulnerability to read beyond the allocated buffer in memory, potentially accessing sensitive data.

Mitigation and Prevention

Protecting systems from CVE-2019-25048 is crucial to maintaining security.

Immediate Steps to Take

Update LibreSSL to a patched version that addresses the heap-based buffer over-read vulnerability.
Monitor for any unusual activities that could indicate exploitation of the vulnerability.

Long-Term Security Practices

Regularly update software and libraries to ensure the latest security patches are applied.
Conduct security assessments and audits to identify and address vulnerabilities proactively.

Patching and Updates

Ensure timely patching of LibreSSL to mitigate the risk posed by the heap-based buffer over-read vulnerability.