CVE-2017-8807 : Vulnerability Insights and Analysis

Vulnerability in Varnish HTTP Cache versions 4.1.x before 4.1.9 and 5.x before 5.2.1 allows remote attackers to access confidential data from memory.

Understanding CVE-2017-8807

The vulnerability vbf_stp_error in the file cache_fetch.c of Varnish HTTP Cache versions 4.1.x before 4.1.9 and 5.x before 5.2.1 can be exploited by remote attackers to access confidential data from the memory of the affected process.

What is CVE-2017-8807?

The vulnerability arises due to the VFP_GetStorage buffer being larger than intended in specific situations involving Stevedore transient objects saved in the -sfile.

The Impact of CVE-2017-8807

Remote attackers can exploit this vulnerability to obtain sensitive information from process memory.

Technical Details of CVE-2017-8807

The technical details of the CVE-2017-8807 vulnerability are as follows:

Vulnerability Description

The vbf_stp_error in Varnish HTTP Cache versions 4.1.x before 4.1.9 and 5.x before 5.2.1 allows remote attackers to obtain sensitive information from process memory due to a buffer size issue.

Affected Systems and Versions

Product: Varnish HTTP Cache 4.1.x before 4.1.9 and 5.x before 5.2.1

Exploitation Mechanism

The vulnerability can be exploited remotely by attackers to access confidential data from the memory of the affected process.

Mitigation and Prevention

Steps to mitigate and prevent the CVE-2017-8807 vulnerability:

Immediate Steps to Take

Update Varnish HTTP Cache to versions 4.1.9 and 5.2.1 or later.
Monitor security advisories for any patches or updates.

Long-Term Security Practices

Regularly update software and apply security patches.
Implement network security measures to prevent unauthorized access.

Patching and Updates

Apply the patches provided by Varnish Cache to address the vulnerability.