10-02-2012
Quote:
Uhm... How can it be done without having write access to the script?
Because the command is being run from a
variable. I'm guessing he didn't do that on a lark, but because he wanted the contents to vary depending on how the script is used.
That leaves room for injection of malicious strings unless done very,
very carefully.
It's also completely avoidable by just not using eval at all.
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LEARN ABOUT DEBIAN
logcheck-test
logcheck-test(1) General Commands Manual logcheck-test(1)
NAME
logcheck-test - test new logcheck rules easily
SYNOPSIS
logcheck-test [-q|-i] [-a|-s|-l FILE] [-e] [-P PREFIX] [-S SUFFIX] RULE
logcheck-test [-q|-i] [-a|-s|-l FILE] -r RULEFILE
DESCRIPTION
logcheck-test parses a log file for matching lines specified by a single rule or a rule file. If using a single RULE you can set a PREFIX
and a SUFFIX to write new rules easily.
OPTIONS
-h, --help
Show usage information
-a, --auth.log
Parse /var/log/auth.log for matching lines
-s, --syslog
Parse /var/log/syslog for matching lines
-l, --log-file FILE
Parse FILE for matching lines
-i, --invert-match
Show line that don't match the RULE or the RULEFILE
-q, --quiet
Suppress rule summary at the end of output
-e, --surround-rule
Surround RULE with standard prefix and suffix:
^[[:alpha:]]{3} [ :[:digit:]]{11} [._[:alnum:]-]+ RULE$
-P, --append-prefix PREFIX
Append PREFIX to rule prefix. Option can be given multiple times
-S, --prepend-suffix SUFFIX
Prepend SUFFIX to rule suffix. Option can be given multiple times
-r, --rule-file RULEFILE
Use file RULEFILE for rule input
EXAMPLES
With logcheck-test you can easily write and test new rules.
Test a single rule against /var/log/syslog:
logcheck-test -s "RULE"
Test a single rule against ~/log, surround the rule with standard prefix and suffix and append "kernel " to prefix:
logcheck-test -l ~/log -e -P "kernel " "RULE"
Test the rules in rulefiles/linux/ignore.d.server/kernel against ~/log:
logcheck-test -l ~/log -r rulefiles/linux/ignore.d.server/kernel
Test which lines the rules in rulefiles/linux/ignore.d.server/kernel doesn't match:
logcheck-test -l ~/log -r rulefiles/linux/ignore.d.server/kernel -i
EXIT STATUS
On successful matching logcheck-test will complete with exit code 0. An exit code of 1 indicates no successful matching.
An exit code greater then 1 indicates an error occurred. Textual errors are written to the standard error stream.
SEE ALSO
logcheck(8)
AUTHOR
logcheck is developed by Debian logcheck Team at alioth: http://alioth.debian.org/projects/logcheck/. This manual was written by Hannes von
Haugwitz <hannes@vonhaugwitz.com>.
Feb 19, 2010 logcheck-test(1)