Vulnerabilities
Misconfiguration
Runtime Security
Compliance
CVE Vulnerabilities

CVE-2021-42855

Incorrect Permission Assignment for Critical Resource

Published: Mar 10, 2022 | Modified: Aug 09, 2022
CVSS 3.x
7.8
HIGH
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
4.6 MEDIUM
AV:L/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
Ubuntu
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2021-42855
CWEhttps://cwe.mitre.org/data/definitions/732.html

It was discovered that the SteelCentral AppInternals Dynamic Sampling Agent (DSA) uses the .debug_command.config file to store a json string that contains a list of IDs and pre-configured commands. The config file is subsequently used by the /api/appInternals/1.0/agent/configuration API to map the corresponding ID to a command to be executed.

Weakness

The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.

Affected Software

Name Vendor Start Version End Version
Steelcentral_appinternals_dynamic_sampling_agent Riverbed 11.0.0 (including) 11.8.8 (excluding)
Steelcentral_appinternals_dynamic_sampling_agent Riverbed 12.0.0 (including) 12.13.0 (excluding)
Steelcentral_appinternals_dynamic_sampling_agent Riverbed 10.0.0 (including) 10.0.0 (including)

Potential Mitigations

  • Run the code in a “jail” or similar sandbox environment that enforces strict boundaries between the process and the operating system. This may effectively restrict which files can be accessed in a particular directory or which commands can be executed by the software.
  • OS-level examples include the Unix chroot jail, AppArmor, and SELinux. In general, managed code may provide some protection. For example, java.io.FilePermission in the Java SecurityManager allows the software to specify restrictions on file operations.
  • This may not be a feasible solution, and it only limits the impact to the operating system; the rest of the application may still be subject to compromise.
  • Be careful to avoid CWE-243 and other weaknesses related to jails.

References

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