CVE-2019-25078 : Security Advisory and Response

A buffer overflow vulnerability in pacparser versions up to 1.3.x allows for local exploitation through manipulation of the url argument in the pacparser_find_proxy function. Upgrading to version 1.4.0 is crucial to mitigate this issue.

Understanding CVE-2019-25078

This CVE identifies a buffer overflow vulnerability in pacparser versions up to 1.3.x, affecting the pacparser_find_proxy function.

What is CVE-2019-25078?

The vulnerability in pacparser allows for a buffer overflow by manipulating the url argument, enabling local exploitation.

The Impact of CVE-2019-25078

Exploitation can lead to unauthorized access or denial of service attacks.
Affected systems may suffer from compromised integrity and availability.

Technical Details of CVE-2019-25078

This section provides detailed technical information about the vulnerability.

Vulnerability Description

Vulnerability Type: Buffer Overflow (CWE-119, CWE-120)
CVSS Score: 5.3 (Medium)
Attack Vector: Local
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Unchanged
Impact: Low confidentiality, integrity, and availability

Affected Systems and Versions

Vendor: Unspecified
Product: pacparser
Affected Versions: 1.0, 1.1, 1.2, 1.3

Exploitation Mechanism

Exploitation occurs locally by manipulating the url argument in the pacparser_find_proxy function.

Mitigation and Prevention

To address CVE-2019-25078, follow these mitigation steps:

Immediate Steps to Take

Upgrade pacparser to version 1.4.0.
Apply the patch associated with the upgrade (853e8f45607cb07b877ffd270c63dbcdd5201ad9).

Long-Term Security Practices

Regularly update software components to the latest versions.
Implement secure coding practices to prevent buffer overflows.
Conduct security assessments and code reviews to identify vulnerabilities.

Patching and Updates

Stay informed about security updates and patches for pacparser.