CVE-2017-0901 Explained : Impact and Mitigation

RubyGems versions before 2.6.13 have a vulnerability that allows a malicious gem to overwrite files on the filesystem.

Understanding CVE-2017-0901

This CVE involves a flaw in the validation of specification names in RubyGems, potentially leading to file system manipulation by a specially crafted gem.

What is CVE-2017-0901?

The vulnerability in RubyGems versions prior to 2.6.13 allows an attacker to overwrite any file on the system using a malicious gem due to inadequate specification name validation.

The Impact of CVE-2017-0901

The vulnerability could be exploited by an attacker to compromise the integrity and confidentiality of the system by manipulating files on the filesystem.

Technical Details of CVE-2017-0901

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

RubyGems versions 2.6.12 and earlier lack proper validation of specification names, enabling a malicious gem to potentially overwrite files on the filesystem.

Affected Systems and Versions

Product: RubyGems
Vendor: HackerOne
Versions affected: Versions before 2.6.13

Exploitation Mechanism

The vulnerability can be exploited by crafting a specially designed gem that takes advantage of the flawed specification name validation to overwrite files on the system.

Mitigation and Prevention

Protecting systems from CVE-2017-0901 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update RubyGems to version 2.6.13 or newer to mitigate the vulnerability.
Avoid installing gems from untrusted sources.
Monitor file system changes for any unauthorized modifications.

Long-Term Security Practices

Regularly update software and dependencies to patch known vulnerabilities.
Implement least privilege access controls to limit the impact of potential attacks.
Conduct security assessments and audits to identify and address vulnerabilities proactively.

Patching and Updates

Apply security patches provided by RubyGems promptly to address the vulnerability and enhance system security.