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AIX libC _LIB_INIT_DBG file creation vulnerability -Part 2 -AIX 6.1

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AIX libC _LIB_INIT_DBG file creation vulnerability -Part 2 -AIX 6.1

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
08/09/2009
Created
07/25/2018
Added
09/05/2014
Modified
10/05/2015

Description

There is a an error in the handling of the _LIB_INIT_DBG and _LIB_INIT_DBG_FILE environment variables in a debugging component of the XL C++ runtime library. A local user can exploit this error when executing setuid root programs linked with the XL C++ runtime library, and thereby create arbirtrary, world writeable files owned by root. The successful exploitation of this vulnerability allows a local user to create arbitrary files and execute arbitrary code as the root user. In AIX 6.1 the debugging component moved from libC.a to libc.a. This means that the fix is delivered by updating the XL C++ runtime on AIX 5.3 and earlier, and by updating the bos.rte.libc fileset on AIX 6.1. The following libraries are vulnerable: /usr/ccs/lib/libc.a /usr/ccs/lib/libp/libc.a

Solution(s)

  • aix-6.1-libC_advisory_2

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