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GHSA-8g9c-28fc-mcx2
No affected components available
Duplicate Advisory
This advisory has been withdrawn because it is a duplicate of GHSA-59j7-ghrg-fj52. This link is maintained to preserve external references.
Original Description
Impact
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 encrypt key registered with the IDP(Entra ID) 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.
Patches
The vulnerability has been fixed. Users should update all their Microsoft.IdentityModel versions to 7.1.2 (for 7x) or higher, 6.34.0 (for 6x) or higher, and 5.7.0 (for 5x).
Workarounds
No, users must upgrade.
References
https://aka.ms/IdentityModel/Jan2024/zip
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs high-level or administrative privileges. No user interaction is needed for the attacker to exploit this vulnerability. The vulnerability can affect other systems as well, not just the initial system. There is a high impact on the availability of the system.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
Probability that this vulnerability will be exploited in the wild within the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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