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Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVE-2021-21345

High
9.9/10

Summary

XStream is a Java library to serialize objects to XML and back again. In XStream versions prior to 1.4.16, there is a vulnerability which may allow a remote attacker who has sufficient rights to execute commands of the host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16. This has same fix as CVE-2021-21341, CVE-2021-21343, CVE-2021-21344, CVE-2021-21342, CVE-2021-21346, CVE-2021-21347, CVE-2021-21348,CVE-2021-21349, CVE-2021-21350, and CVE-2021-21351.

  • LOW
  • NETWORK
  • HIGH
  • CHANGED
  • NONE
  • LOW
  • HIGH
  • HIGH

CWE-78 - OS Command Injection

The OS command injection weakness (also known as shell injection) is a vulnerability which enables an attacker to run arbitrary OS commands on a server. This is done by modifying the intended downstream OS command and injecting arbitrary commands, enabling the execution of unauthorized OS commands. This has the potential to fully compromise the application along with all of its data, and, if the compromised process does not follow the principle of least privileges, it may compromise other parts of the hosting infrastructure as well. This weakness is listed as number ten in the 'CWE Top 25 Most Dangerous Software Weaknesses'.

References

Advisory Timeline

  • Published