What is the CVSS score of CVE-2024-42220?

CVE-2024-42220 has a CVSS 3.1 base score of 9.1 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N. EPSS exploitation probability: 0.7%.

Is there a public PoC exploit available for CVE-2024-42220?

Yes, a public proof-of-concept exploit is available for CVE-2024-42220. Prioritise patching immediately. EPSS: 0.7%.

Jwt Attack CVE-2024-42220

CRITICAL

Improper Verification of Cryptographic Signature (CWE-347)

2024-12-18 talos-cna@cisco.com

Authentication Bypass Apple Jwt Attack Microsoft Outlook

9.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.1 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Lifecycle Timeline

CVE Published

Dec 18, 2024 - 23:15 nvd

CRITICAL 9.1

DescriptionNVD

A library injection vulnerability exists in Microsoft Outlook 16.83.3 for macOS. A specially crafted library can leverage Outlook's access privileges, leading to a permission bypass. A malicious application could inject a library and start the program to trigger this vulnerability and then make use of the vulnerable application's permissions.

AnalysisAI

A library injection vulnerability exists in Microsoft Outlook 16.83.3 for macOS. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-347. A library injection vulnerability exists in Microsoft Outlook 16.83.3 for macOS. A specially crafted library can leverage Outlook's access privileges, leading to a permission bypass. A malicious application could inject a library and start the program to trigger this vulnerability and then make use of the vulnerable application's permissions. Affected products include: Microsoft Outlook.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.