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https://gitlab.com/kalilinux/packages/unix-privesc-check.git
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56 lines
2.1 KiB
Plaintext
56 lines
2.1 KiB
Plaintext
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#!/bin/sh
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# $Revision: 333 $
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#
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# (c) Tim Brown, 2012
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# <mailto:timb@nth-dimension.org.uk>
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# <http://www.nth-dimension.org.uk/> / <http://www.machine.org.uk/>
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#
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# Check if privileged files call temporary files handling functions
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# Based on ideas found at http://people.redhat.com/sgrubb/security/
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. lib/misc/stdio
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. lib/misc/privileged
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. lib/misc/binary
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privileged_tmp_init () {
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stdio_message_log "privileged_tmp" "Starting at: `date`"
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}
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privileged_tmp_main () {
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privileged_list | while read filetype filename usergroupid
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do
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if [ "`binary_matches_string \"${filename}\" \"/tmp\"`" -eq 1 ]
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then
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if [ "`file_is_textual \"${filename}\"`" -eq 1 -a "`binary_matches_string \"${filename}\" \">\"`" -eq 1 ]
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then
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stdio_message_warn "privileged_tmp" "${filetype} ${filename} script (${usergroupid}) may create predictable files in /tmp unsafely"
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elif [ "`binary_matches_function \"${filename}\" \"mkstemp|tempnam|tmpfile\"`" -eq 1 ]
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then
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# XXX is part of template filename that is replaced by mkstemp, etc. - without an XXX, we assume the filename is likely to be predictable
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if [ "`binary_matches_string \"${filename}\" \"XXX\"`" -ne 1 ]
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then
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stdio_message_warn "privileged_tmp" "${filetype} ${filename} (${usergroupid}) may create predictable files in /tmp unsafely"
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fi
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fi
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fi
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done
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}
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privileged_tmp_fini () {
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stdio_message_log "privileged_tmp" "Ending at: `date`"
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}
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