CVE-2025-55753
BaseFortify
Publication date: 2025-12-05
Last updated on: 2025-12-10
Assigner: Apache Software Foundation
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| apache | http_server | From 2.4.30 (inc) to 2.4.66 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-190 | The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is an integer overflow that occurs during failed ACME certificate renewals in Apache HTTP Server versions from 2.4.30 before 2.4.66. After about 30 days of repeated failures, the backoff timer resets to 0, causing the server to attempt certificate renewal repeatedly without any delay until it succeeds.
How can this vulnerability impact me? :
The impact of this vulnerability is that the server will continuously attempt to renew the certificate without any delay after repeated failures, which could lead to excessive resource consumption or potential denial of service conditions due to the rapid retry attempts.
What immediate steps should I take to mitigate this vulnerability?
Users are recommended to upgrade Apache HTTP Server to version 2.4.66, which fixes the issue.