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

CVE-2011-2684

Medium
5.5/10

Summary

foo2zjs before 20110722dfsg-3ubuntu1 as packaged in Ubuntu, 20110722dfsg-1 as packaged in Debian unstable, and 20090908dfsg-5.1+squeeze0 as packaged in Debian squeeze create temporary files insecurely, which allows local users to write over arbitrary files via a symlink attack on /tmp/foo2zjs.

  • LOW
  • LOCAL
  • HIGH
  • UNCHANGED
  • 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.

References

Advisory Timeline

  • Published