Description

CAI Content Credentials is affected by an Integer Underflow (Wrap or Wraparound) vulnerability that could result in an application denial-of-service. An attacker could exploit this vulnerability to crash the application, leading to a denial-of-service condition. Exploitation of this issue does not require user interaction.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.5",
  "pubDate": "2026-08-25T18:18:01.333Z",
  "pubdate": "2026-08-25T18:18:01.333Z",
  "executiveSummary": "CAI Content Credentials contains an integer underflow vulnerability susceptible to remote exploitation.\nThe vulnerability occurs due to improper handling of arithmetic operations, leading to an application crash.\nImpact includes a denial-of-service (DoS) condition, rendering the application unavailable to legitimate users.\nNo user interaction is required to trigger the exploit, increasing the risk of automated or remote attacks.\nThis flaw resides within the processing logic of the content credentials framework, which could be leveraged by an unauthenticated attacker to force service termination.\nThe risk is categorized as high for availability, as the failure results in a complete cessation of application services without the need for elevated privileges or interaction.",
  "technicalDetails": "The vulnerability is classified as an Integer Underflow (CWE-191), occurring during the processing of data structures within CAI Content Credentials.\nRoot Cause: The application fails to implement adequate input validation or bounds checking when performing arithmetic subtractions on unsigned integer variables. When a negative result is produced from an operation that expects a positive value, the integer wraps around to a large positive value (e.g., 2^n - 1). This unexpected value is subsequently used as a length, index, or memory offset.\nExploitation Flow: An attacker provides a maliciously crafted input, such as a specially formatted content credential file or metadata structure. This input is parsed by the application's credential handling engine. During the parsing process, an arithmetic operation on a length field or counter results in an underflow condition. The resulting wrap-around value creates an inconsistency in memory or buffer allocation sizes.\nPayload Behavior: The application attempts to access, allocate, or iterate over memory based on the corrupted integer value. This leads to an out-of-bounds memory access, a pointer dereference error, or an invalid memory access exception. Because the application lacks sufficient exception handling or fault-tolerance mechanisms, the runtime environment terminates the process, resulting in a denial-of-service condition.\nAuthentication/Privilege: The vulnerability can be exploited by an unauthenticated attacker, as the credential parsing logic is often exposed to incoming data streams or external inputs that do not require valid authentication sessions to process.\nImpact: Successful exploitation results in the immediate termination of the application instance. In environments where the application is stateless or contains limited crash recovery mechanisms, this leads to persistent service unavailability.\nMemory Impact: The integer underflow effectively bypasses logic guards designed to prevent buffer overflows or logic errors, causing the application to enter an undefined state that triggers a crash rather than a controlled error handling routine."
}