Negative Content-Length Header Vulnerability in Mongoose HTTP Server by Cesanta
CVE-2023-34188

7.5HIGH

Key Information:

Vendor

Cesanta

Status
Mongoose
Vendor
CVE Published:
23 June 2023

What is CVE-2023-34188?

The Mongoose HTTP server, prior to version 7.10, is susceptible to a denial of service vulnerability triggered by handling negative Content-Length headers. An attacker can exploit this weakness by sending a specially crafted TCP payload, resulting in an infinite loop where the server continuously reparses the payload, effectively preventing it from responding to legitimate requests. This flaw can significantly affect service availability and performance, highlighting the importance of timely updates to mitigate such risks.

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References

https://github.com/cesanta/mongoose/commit/4663090a8fb036...
https://github.com/cesanta/mongoose/pull/2197
https://github.com/cesanta/mongoose/compare/7.9...7.10

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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