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

CVE-2019-18658

High
9.8/10

Summary

In Helm versions 2.x through to 2.15.1 and 3.x through 3.0.0-beta.5, commands that deal with loading a chart as a directory or packaging a chart provide an opportunity for a maliciously designed chart to include sensitive content such as `/etc/passwd`, or to execute a Denial Of Service (DoS) via a special file such as `/dev/urandom`, via symlinks. No version of Tiller is known to be impacted. This is a client-only issue.

  • LOW
  • NETWORK
  • HIGH
  • UNCHANGED
  • NONE
  • NONE
  • HIGH
  • HIGH

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.

References

Advisory Timeline

  • Published