CVE-2025-64076
Description
A flaw was found in cbor2. This vulnerability allows denial of service through process crashes or memory exhaustion via sending specially-crafted CBOR data containing definite-length text strings with multi-byte UTF-8 characters.
Statement
This flaw is marked IMPORTANT because the highest threat of this flaw is to system availability, as successful exploitation can lead to denial of service through process crashes or memory exhaustion.
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Crash, Exit, or Restart; DoS: Resource Consumption (CPU); DoS: Resource Consumption (Memory); DoS: Instability
This weakness will generally lead to undefined behavior and therefore crashes. In the case of overflows involving loop index variables, the likelihood of infinite loops is also high.
Integrity
Technical Impact: Modify Memory
If the value in question is important to data (as opposed to flow), simple data corruption has occurred. Also, if the wrap around results in other conditions such as buffer overflows, further memory corruption may occur.
Confidentiality,Availability,Access Control
Technical Impact: Execute Unauthorized Code or Commands; Bypass Protection Mechanism
This weakness can sometimes trigger buffer overflows which can be used to execute arbitrary code. This is usually outside the scope of a program's implicit security policy.
Frequently Asked Questions
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