Vulnerabilities
Misconfiguration
Runtime Security
Compliance
CVE Vulnerabilities

CVE-2021-40123

Incorrect Default Permissions

Published: Oct 21, 2021 | Modified: Nov 07, 2023
CVSS 3.x
6.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS 2.x
4 MEDIUM
AV:N/AC:L/Au:S/C:P/I:N/A:N
RedHat/V2
RedHat/V3
Ubuntu
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2021-40123
CWEhttps://cwe.mitre.org/data/definitions/276.html

A vulnerability in the web-based management interface of Cisco Identity Services Engine (ISE) could allow an authenticated, remote attacker with administrative read-only privileges to download files that should be restricted. This vulnerability is due to incorrect permissions settings on an affected device. An attacker could exploit this vulnerability by sending a crafted HTTP request to the device. A successful exploit could allow the attacker to download files that should be restricted.

Weakness

During installation, installed file permissions are set to allow anyone to modify those files.

Affected Software

Name Vendor Start Version End Version
Identity_services_engine Cisco * 2.6 (including)
Identity_services_engine Cisco 2.6.0 (including) 2.6.0 (including)
Identity_services_engine Cisco 2.6.0-patch1 (including) 2.6.0-patch1 (including)
Identity_services_engine Cisco 2.6.0-patch2 (including) 2.6.0-patch2 (including)
Identity_services_engine Cisco 2.6.0-patch3 (including) 2.6.0-patch3 (including)
Identity_services_engine Cisco 2.6.0-patch5 (including) 2.6.0-patch5 (including)
Identity_services_engine Cisco 2.6.0-patch6 (including) 2.6.0-patch6 (including)
Identity_services_engine Cisco 2.6.0-patch7 (including) 2.6.0-patch7 (including)
Identity_services_engine Cisco 2.6.0-patch8 (including) 2.6.0-patch8 (including)
Identity_services_engine Cisco 2.6.0-patch9 (including) 2.6.0-patch9 (including)
Identity_services_engine Cisco 2.7 (including) 2.7 (including)
Identity_services_engine Cisco 2.7(0.207) (including) 2.7(0.207) (including)
Identity_services_engine Cisco 2.7(0.356) (including) 2.7(0.356) (including)
Identity_services_engine Cisco 2.7(0.903) (including) 2.7(0.903) (including)
Identity_services_engine Cisco 2.7.0 (including) 2.7.0 (including)
Identity_services_engine Cisco 2.7.0-patch1 (including) 2.7.0-patch1 (including)
Identity_services_engine Cisco 2.7.0-patch2 (including) 2.7.0-patch2 (including)
Identity_services_engine Cisco 2.7.0-patch3 (including) 2.7.0-patch3 (including)
Identity_services_engine Cisco 2.7.0-patch4 (including) 2.7.0-patch4 (including)
Identity_services_engine Cisco 3.0(0.458) (including) 3.0(0.458) (including)
Identity_services_engine Cisco 3.0.0 (including) 3.0.0 (including)
Identity_services_engine Cisco 3.0.0-patch1 (including) 3.0.0-patch1 (including)
Identity_services_engine Cisco 3.0.0-patch2 (including) 3.0.0-patch2 (including)
Identity_services_engine Cisco 3.0.0-patch3 (including) 3.0.0-patch3 (including)

Potential Mitigations

  • Compartmentalize the system to have “safe” areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
  • Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.

References

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