8.2

CVSS Score

3.0

-

CVSS Score

Basic Information

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CVE-2024-27983

CVE-2024-27983: An attacker can make the Node.js HTTP/2 server completely unavailable by sending a small amount...

An attacker can make the Node.js HTTP/2 server completely unavailable by sending a small amount of HTTP/2 frames packets with a few HTTP/2 frames inside. It is possible to leave some data in nghttp2 memory after reset when headers with HTTP/2 CONTINUATION frame are sent to the server and then a TCP connection is abruptly closed by the client triggering the Http2Session destructor while header frames are still being processed (and stored in memory) causing a race condition.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2024-27983

CVE-2024-27983:

8.2

CVSS Score

3.0

-

CVSS Score

Basic Information

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Technical Details

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Root Cause Analysis

The analysis started by reviewing the vulnerability description and provided URLs. The Node.js security advisory for CVE-2024-27983 was identified as a key source, explicitly naming the function node::http2::Http2Session::~Http2Session() as the location of an assertion failure leading to a server crash. A GitHub pull request (PR #52300) titled 'http2: fix Http2Session destructor race condition (CVE-2024-27983)' further corroborated this. Attempts to fetch the specific commit details for this PR using the get_commit_infos tool were unsuccessful. However, the information from the security advisory and the PR title provides strong evidence that node::http2::Http2Session::~Http2Session() is the vulnerable function. The vulnerability description details a race condition involving the processing of HTTP/2 CONTINUATION frames, an abrupt client disconnection, and the subsequent execution of the Http2Session destructor, which aligns with the identified function. The file path src/http2/http2_session.cc is inferred as the standard location for this C++ class in the Node.js codebase.

Vulnerable functions

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WAF Rule

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Reasoning

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