CVE-2017-10908 : Security Advisory and Response

H2O version 2.2.3 and earlier have a vulnerability that can be exploited by remote attackers to disrupt the server's functionality through manipulation of the HTTP/2 header.

Understanding CVE-2017-10908

This CVE involves a denial-of-service vulnerability in H2O versions 2.2.3 and prior.

What is CVE-2017-10908?

CVE-2017-10908 is a security flaw in H2O versions 2.2.3 and earlier that allows remote attackers to trigger a denial-of-service condition by sending specially crafted HTTP/2 headers.

The Impact of CVE-2017-10908

The vulnerability can be exploited by remote attackers to disrupt the server's functionality, potentially leading to service unavailability.

Technical Details of CVE-2017-10908

This section provides more technical insights into the CVE.

Vulnerability Description

H2O version 2.2.3 and earlier are susceptible to a denial-of-service attack due to improper handling of HTTP/2 headers.

Affected Systems and Versions

Product: H2O
Vendor: Kazuho Oku
Versions Affected: version 2.2.3 and earlier

Exploitation Mechanism

Remote attackers can exploit this vulnerability by manipulating the HTTP/2 header with precise crafting.

Mitigation and Prevention

Protecting systems from CVE-2017-10908 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update H2O to a patched version that addresses the vulnerability.
Monitor network traffic for any suspicious activity targeting HTTP/2 headers.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Implement network intrusion detection systems to identify and block malicious traffic.

Patching and Updates

Stay informed about security advisories from H2O and apply patches as soon as they are available.