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4/28/2019 · Brief description. logrotate is prone to a race condition after renaming the logfile. If logrotate is executed as root, with option that creates a file ( like create, copy, compress, etc.) and the user is in control of the logfile path, it is possible to abuse a race-condition to write files in ANY directories.
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Logrotate in Linux is mainly used to rotate, compress and mail the System logs. When there is a large number of logs are generated into the system then It allows automatic rotation, compression and the removal of the old logs.
10/7/2019 · * logrotate poc exploit * * [ Brief description ] * – logrotate is prone to a race condition after renaming the logfile. * – If logrotate is executed as root and the user is in control of the logfile path, it is possible to abuse a race-condition to write files in ANY directories.
1/14/2019 · Logrotate is designed to ease administration of systems that generate large numbers of log files. It allows automatic rotation, compression, removal, and mailing of log files. Each log file may be handled daily, weekly, monthly, or when it grows too large. It also gives you a root shell.
11/16/2016 · # # The exploit waits for Nginx server to be restarted or receive a USR1 signal. # On Debian-based systems the USR1 signal is sent by logrotate (/etc/ logrotate .d/nginx) # script which is called daily by the cron.daily on default installations. # The restart should take place at 6:25am which is when cron.daily executes.
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As soon as root logs in, a reverse shell will be executed then. A sample exploit can be found on github https://github.com … Default installations might not be affected by this problem because SElinux should prevent logrotate from creating files in /etc. Version-Release number of selected component (if applicable): Name …
/* sing file append exploit by bannedit 12/05/2007 The original reporter of this issue included an example session which added an account to the machine. The method for this exploit is slightly different and much more quiet. Although it relies upon logrotate for help.