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

CVE-2013-4136

Low
0/10

Summary

"Ext/common/ServerInstanceDir.h" in Phusion Passenger gem prior to 4.0.6 for Ruby allows local users to gain privileges or possibly change the ownership of arbitrary directories via a symlink attack on a directory with a predictable name in /tmp/.

  • MEDIUM
  • LOCAL
  • NONE
  • PARTIAL
  • PARTIAL
  • PARTIAL

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