Cray UNICOS script and nu command line buffer overflow

unicos-command-line-bo (24276) The risk level is classified as HighHigh Risk


Cray UNICOS is vulnerable to a command line buffer overflow in the /usr/bin/script and /etc/nu binaries. By sending an overly long command line argument to one of the affected binaries, a local attacker could overflow a buffer and execute arbitrary code on the system with elevated privileges.


Gain Privileges


No remedy available as of September 1, 2014.


  • Neohapsis Archives - Full Disclosure List - #0343: SUID root overflows in UNICOS and partial shellcode.
  • BID-16205: Cray UNICOS Multiple Local Command Line Argument Buffer Overflow Vulnerabilities
  • CVE-2006-0177: Multiple buffer overflows in Cray UNICOS might allow local users to gain privileges by (1) invoking /usr/bin/script with a long command line argument or (2) setting the -c option of /etc/nu to the name of a file containing a long line.
  • OSVDB ID: 22483: UNICOS /usr/bin/script Command Line Argument Local Overflow
  • OSVDB ID: 22484: UNICOS /etc/nu -c Option Filename Processing Local Overflow

Platforms Affected:

  • Cray UNICOS


Jan 10, 2006

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