Often times files are installed to multiple locations so listing out the files contained by a package is helpful. ~]$ find /usr/local -xdev -perm -4000 -ls 2>/dev/nullĦ8555095 4548 -rwsr-xr-x 1 root root 4653080 Oct 29 02:25 /usr/local/bin/barracudavpnĪn alternative to using find is to inspect the files installed by a specific package. Finally, stderr is redirected to /dev/null to discard errors caused by insufficient permissions. The -ls option is a nice built-in feature to automatically display the long list of file attributes. It’s better to be intentional when using find instead of blindly using / for the target path. I generally use the -xdev option to avoid traversing other files systems such as NFS. ![]() ![]() ![]() This example displays setuid binaries under the /usr/local directory. The first step is to identify a privileged binary. When researching for potential vulnerabilities with privileged binaries a test system should be used to avoid causing damage or negative impacts. This post will walk through the process on how I found and exploited the vulnerability on Linux. ![]() The barracudavpn component of the Barracuda VPN Client prior to version 5.0.2.7 for Linux, macOS, and OpenBSD runs as a privileged process and can allow an unprivileged local attacker to load a malicious library, resulting in arbitrary code executing as root.
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