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Improper Link Resolution Before File Access ('Link Following')


Severity Medium
Score 5.6/10


In Kubernetes versions 1.3.0-alpha.0 through 1.7.13, 1.8.0-alpha.0 through 1.8.8 and 1.9.0-alpha.0 through 1.9.3 containers using a secret, configMap, projected or downwardAPI volume can trigger deletion of arbitrary files/directories from the nodes where they are running.

  • HIGH
  • HIGH
  • NONE
  • LOW
  • NONE
  • NONE

CWE-59 - Improper Link Resolution Before File Access

'Improper link resolution before file access' occurs when software accesses a file resource but fails to verify that the file isn't a link or shortcut to another file. An attacker can potentially gain access to arbitrary files and from there the impact can vary, depending on the application, from sensitive data exposure to remote code execution.

Advisory Timeline

  • Published