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": "6.2",
  "pubDate": "2026-08-25T18:18:04.673Z",
  "pubdate": "2026-08-25T18:18:04.673Z",
  "executiveSummary": "CAI Content Credentials is susceptible to an integer underflow vulnerability, classified as a memory-related flaw. This vulnerability manifests when the application performs arithmetic operations on integer values without proper bounds checking, resulting in a wrap-around condition.\nThe primary impact of this vulnerability is a denial-of-service (DoS) condition, wherein the application becomes unstable or crashes upon processing malicious input designed to trigger the underflow.\nExploitation does not require user interaction, allowing for remote or local triggering depending on the integration context of the affected component.\nThe risk is characterized by potential service disruption, affecting the availability of the application. Given that no authentication is required to initiate the attack flow, the vulnerability presents a significant risk to systems relying on CAI Content Credentials for secure metadata verification.",
  "technicalDetails": "The vulnerability resides within the internal logic responsible for handling numeric data structures within CAI Content Credentials. An integer underflow occurs when an arithmetic operation results in a value smaller than the minimum representable value for the specific integer type being utilized. When this occurs, the value wraps around to a very large positive number due to two's complement representation or similar low-level memory handling behaviors.\nThe root cause is a lack of validation or boundary checks on input data before passing it to internal arithmetic functions. In a typical attack flow, an attacker submits a crafted payload containing specific byte sequences that, when parsed by the application, force an integer variable to decrement below zero. For example, if a length field is read from a metadata header and improperly subtracted from an offset without a check, the resulting value will wrap to a near-maximum integer value.\nThis resultant unexpected value is frequently used by the application as an index, buffer size, or memory allocation parameter. When the application attempts to allocate memory or write data based on this incorrect, inflated integer, it triggers an out-of-bounds access, a memory corruption event, or an invalid pointer dereference. These illegal operations consistently lead to immediate process termination, effectively crashing the application service.\nBecause the vulnerability involves the core processing logic of the content verification engine, it is often triggered during the initial parsing of metadata headers or during the deserialization of content credentials. Since the parsing process is generally automated and does not rely on user intervention, an attacker can reliably cause a service disruption by sending the malformed data to any endpoint that consumes or processes CAI Content Credentials data.\nThe exploitation does not require the attacker to have pre-existing privileges or authentication, as the crash occurs at the parsing layer before access control mechanisms are typically enforced. The post-exploitation state is a deadlocked or terminated process, necessitating a service restart to restore operational status."
}