According to the CVSS metric, privileges required is high (PR:H). What does that mean for this vulnerability? The attacker must have access to the public encrypt key registered with the IDP(Entra ID) for successful exploitation. How could an attacker exploit this vulnerability? An attacker could exploit this vulnerability by crafting a malicious JSON Web Encryption (JWE) token with a high compression ratio. This token, when processed by a server, leads to excessive memory allocation and processing time during decompression, causing a denial-of-service (DoS) condition. It's important to note that the attacker must have access to the public key registered with the IDP(AAD) for successful exploitation. According to the CVSS metric, a successful exploitation could lead to a scope change (S:C). What does this mean for this vulnerability? A scope change (S:C) in the CVSS metric indicates that successful exploitation of this vulnerability could extend beyond the immediate processing of malicious tokens, affecting the overall availability of the system by causing a denial-of-service (DoS) condition.
Morgan Brown with Microsoft