CVE-2017-15298 : Security Advisory and Response
Learn about CVE-2017-15298, a Git vulnerability allowing denial of service attacks via tree object layers. Find mitigation steps and update recommendations here.
Git through version 2.14.2 has a vulnerability that mishandles tree object layers, allowing remote attackers to launch a denial of service attack known as a Git bomb, potentially causing excessive disk consumption.
Understanding CVE-2017-15298
This CVE relates to a flaw in Git's handling of tree object layers, leading to a denial of service vulnerability.
What is CVE-2017-15298?
Git before version 2.14.2 has an issue where remote attackers can exploit the mishandling of tree object layers to execute a denial of service attack using a malicious repository, commonly referred to as a Git bomb. This attack can result in excessive memory and disk consumption.
The Impact of CVE-2017-15298
The vulnerability allows attackers to cause a denial of service by consuming excessive memory and disk space, potentially disrupting Git operations and affecting system performance.
Technical Details of CVE-2017-15298
This section provides more technical insights into the vulnerability.
Vulnerability Description
Git through version 2.14.2 mishandles layers of tree objects, enabling remote attackers to trigger a denial of service attack by creating a Git bomb, impacting memory and disk usage.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions: All versions before 2.14.2 are affected
Exploitation Mechanism
The vulnerability is exploited by crafting a malicious repository that contains a Git bomb, causing the affected process to consume excessive memory and disk space.
Mitigation and Prevention
To address CVE-2017-15298, follow these mitigation strategies:
Immediate Steps to Take
- Update Git to version 2.14.2 or later to patch the vulnerability
- Avoid cloning repositories from untrusted sources
Long-Term Security Practices
- Regularly update Git and other software to the latest versions
- Implement access controls to restrict repository access
Patching and Updates
- Apply patches and updates provided by Git to fix the vulnerability and enhance security measures