AIX digest Buffer Overflow Vulnerability



Date Discovered

December 1, 2000


AIX is a version of the UNIX Operating System distributed by IBM. A vulnerability exists in the operating system which could allow a user an elevation in priviledge. The problem occurs in the digest binary. It is reported that it is possible to overflow a buffer in the program and overwrite a pointer to the stack, which in turn can result in an overflow in a library referenced by the binary. The secondary overflow in the library makes it possible to overwrite other stack variables, including the return address. A malicious user could use this vulnerability to gain an elevation in priviledges, and potentially UID 0.

Technologies Affected

  • IBM AIX 4.3.0
  • IBM AIX 4.3.1
  • IBM AIX 4.3.2
  • IBM AIX 4.3.3

Upgrades available:


This vulnerability was announced by Esa Etelavuori <> on December 1, 2000.

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