CVE-2024-38098

Improper Link Resolution Before File Access ('Link Following') (CWE-59)

Published: Aug 13, 2024

010
CVSS 7.8EPSS 0.04%High
CVE info copied to clipboard

Summary

An elevation of privilege vulnerability exists in the Azure Connected Machine Agent. This vulnerability is associated with improper link resolution before file access, also known as 'link following'. The vulnerability has a CVSS v3.1 base score of 7.8, indicating a high severity level. It requires local access and low privileges to exploit, with no user interaction needed.

Impact

If successfully exploited, this vulnerability could allow an attacker to gain elevated privileges on the affected system. The potential impacts are severe, with high risks to confidentiality, integrity, and availability of the system. An attacker could potentially access sensitive information, modify system files, or disrupt system operations. Given the nature of Azure Connected Machine Agent, this could potentially affect cloud-connected systems, expanding the scope of the impact.

Exploitation

There is no evidence that a public proof-of-concept exists. There is no evidence of proof of exploitation at the moment.

Patch

A patch is available for this vulnerability. Microsoft released the patch on August 13, 2024. The vulnerability affects Azure Connected Machine Agent versions prior to 1.44. Security teams should prioritize updating to version 1.44 or later to mitigate this vulnerability.

Mitigation

1. Update Azure Connected Machine Agent to version 1.44 or later as soon as possible. 2. Implement the principle of least privilege, limiting user access rights to the minimum necessary for their job functions. 3. Monitor for suspicious activities related to file access and privilege escalation attempts. 4. Implement strong access controls and authentication mechanisms for local system access. 5. Regularly audit and review system configurations and permissions, especially those related to file access and symbolic links. 6. Consider implementing application whitelisting to prevent unauthorized executables from running. 7. Keep all systems and software up-to-date with the latest security patches, not just the Azure Connected Machine Agent.

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

Timeline

CVSS

A CVSS base score of 7.8 has been assigned.

Aug 13, 2024 at 5:35 PM / microsoft
First Article

Feedly found the first article mentioning CVE-2024-38098. See article

Aug 13, 2024 at 5:37 PM / Microsoft Security Advisories - MSRC
CVE Assignment

NVD published the first details for CVE-2024-38098

Aug 13, 2024 at 6:15 PM
EPSS

EPSS Score was set to: 0.05% (Percentile: 19%)

Nov 19, 2024 at 3:54 PM
Static CVE Timeline Graph

Affected Systems

Microsoft/azure_connected_machine_agent
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Patches

Microsoft
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Links to Mitre Att&cks

T1547.009: Shortcut Modification
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Attack Patterns

CAPEC-132: Symlink Attack
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References

Microsoft August 2024 Security Updates
Classification: Critical, Solution: Official Fix, Exploit Maturity: High, CVSSv3.1: 9.8, CVEs: CVE-2024-21302, CVE-2024-29995, CVE-2024-37968, CVE-2024-38063, CVE-2024-38084, CVE-2024-38098, CVE-2024-38106, CVE-2024-38107, CVE-2024-38108, CVE-2024-38109, CVE-2024-38114, CVE-2024-38115, CVE-2024-38116, CVE-2024-38117, CVE-2024-38118, CVE-2024-38120, CVE-2024-38121, CVE-2024-38122, CVE-2024-38123, CVE-2024-38125 (+82 other associated CVEs), Summary: https://www.bleepingcomputer.com/news/microsoft/microsoft-august-2024-patch-tuesday-fixes-9-zero-days-6-exploited/ Today is Microsoft's August 2024 Patch Tuesday, which includes security updates for 89 flaws, including six actively exploited and three publicly disclosed zero-days. Microsoft is still working on an update for a tenth publicly disclosed zero-day. This Patch Tuesday fixed eight critical vulnerabilities, which were a mixture of elevation of privileges, remote code execution, and information disclosure. The number of bugs in each vulnerability category is listed below:
Azure Connected Machine Agent Elevation of Privilege Vulnerability
What privileges could be gained by an attacker who successfully exploited this vulnerability? An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.
VERT Threat Alert: August 2024 Patch Tuesday Analysis
While updates for CVE-2024-38200 were released as part of the August Patch Tuesday drop, Microsoft had already enabled a fix for this issue on July 30, meaning that all users of supported versions of Office were protected. This vulnerability, a privilege escalation in the Windows Kernel, requires that the attacker win a race condition to successfully exploit it.

News

CNNVD | 关于微软多个安全漏洞的通报
近日,微软官方发布了多个安全漏洞的公告,其中微软产品本身漏洞84个,影响到微软产品的其他厂商漏洞5个。
The "What's new" document says "Setting OPENSSL_CNF environment at process level to override build openssl.cnf path on Windows." - Version 1.44's code calls a new function in gc_utilities.dll called set_openssl_config_path().
Microsoft’s August Security Update on High-Risk Vulnerabilities in Multiple Products - Security Boulevard
On August 14, NSFOCUS CERT detected that Microsoft released a security update patch for August, which fixed 90 security issues involving widely used products such as Windows, Microsoft Office, Visual Studio and Azure, including high-risk vulnerabilities such as privilege escalation and remote code execution. Due to an error in the Windows Power Dependency Coordinator after release, local attackers authenticated by ordinary users can exploit this vulnerability by running special programs to obtain SYSTEM permissions of the target system.
CNNVD关于微软多个安全漏洞的通报
近日,微软官方发布了多个安全漏洞的公告,其中微软产品本身漏洞84个,影响到微软产品的其他厂商漏洞5个。
August Patch Tuesday goes big – Sophos News
(It should be noted that one issue patched in June, CVE-2024-38213, is under active attack in the wild – a good argument for applying patches as soon as possible after release.) Microsoft also took pains this month to flag three other CVEs for which fixes have already gone out, but that are included in Patch Tuesday information for transparency’s sake; we list those in Appendix D as well. However, with over two dozen advisories, a number of “informational” notices concerning material released in June and July, two high-profile issues for which the fixes are still a work in progress, and over 85 Linux-related CVEs covered in the release, administrators may find their patch prioritization especially complex this month.
See 23 more articles and social media posts

CVSS V3.1

Attack Vector:Local
Attack Complexity:Low
Privileges Required:Low
User Interaction:None
Scope:Unchanged
Confidentiality:High
Integrity:High
Availability Impact:High

Categories

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