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

CVE-2017-5188

Medium
5/10

Summary

The bs_worker code in open build service before 20170320 followed relative symlinks, allowing reading of files outside of the package source directory during build, allowing leakage of private information.

  • LOW
  • LOCAL
  • NONE
  • UNCHANGED
  • REQUIRED
  • LOW
  • HIGH
  • 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.

References

Advisory Timeline

  • Published