J-Security Center

Title: AIX digest Buffer Overflow Vulnerability

Severity: MODERATE

Description:

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.

Affected Products:

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

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