diff options
| author | David M. Lee <dlee@digium.com> | 2013-12-16 19:11:51 +0000 |
|---|---|---|
| committer | David M. Lee <dlee@digium.com> | 2013-12-16 19:11:51 +0000 |
| commit | 744556c01d6e28d4ae46c347f77edfb71778d924 (patch) | |
| tree | bc90f83b4ec9ef0eafb3d952076bf9ea24406366 /configs | |
| parent | 00dcee2a640394ac0aae294396d96985c6c1aba1 (diff) | |
security: Inhibit execution of privilege escalating functions
This patch allows individual dialplan functions to be marked as
'dangerous', to inhibit their execution from external sources.
A 'dangerous' function is one which results in a privilege escalation.
For example, if one were to read the channel variable SHELL(rm -rf /)
Bad Things(TM) could happen; even if the external source has only read
permissions.
Execution from external sources may be enabled by setting
'live_dangerously' to 'yes' in the [options] section of asterisk.conf.
Although doing so is not recommended.
Also, the ABI was changed to something more reasonable, since Asterisk
12 does not yet have a public release.
(closes issue ASTERISK-22905)
Review: http://reviewboard.digium.internal/r/432/
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Merged revisions 403913 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 403917 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 403959 from http://svn.asterisk.org/svn/asterisk/branches/12
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@403960 65c4cc65-6c06-0410-ace0-fbb531ad65f3
Diffstat (limited to 'configs')
| -rw-r--r-- | configs/asterisk.conf.sample | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/configs/asterisk.conf.sample b/configs/asterisk.conf.sample index 404ea30de..f7cda268f 100644 --- a/configs/asterisk.conf.sample +++ b/configs/asterisk.conf.sample @@ -83,6 +83,12 @@ documentation_language = en_US ; Set the language you want documentation ; gosub - Invoke the stdexten using a gosub as ; documented in extensions.conf.sample. ; Default gosub. +;live_dangerously = no ; Enable the execution of 'dangerous' dialplan + ; functions from external sources (AMI, + ; etc.) These functions (such as SHELL) are + ; considered dangerous because they can allow + ; privilege escalation. + ; Default yes, for backward compatability. ; Changing the following lines may compromise your security. ;[files] |