A penetration tester is analyzing a Linux system and finds that the binary /bin/ping has the SUID bit set along with root ownership. What is the security implication of this finding?
Trap 1: It allows remote attackers to execute system calls over ICMP…
ICMP tunneling is a network covert channel, unrelated to SUID execution.
Trap 2: Any local user can execute commands as root by passing malicious…
Standard binaries like ping do not inherently allow arbitrary command execution unless a specific vulnerability exists.
Trap 3: The system is immune to local privilege escalation because SUID is…
SELinux does not automatically disable SUID permissions.
- A
It allows remote attackers to execute system calls over ICMP tunneling.
Why wrong: ICMP tunneling is a network covert channel, unrelated to SUID execution.
- B
Any local user can execute commands as root by passing malicious arguments to the SUID binary.
Why wrong: Standard binaries like ping do not inherently allow arbitrary command execution unless a specific vulnerability exists.
- C
The system is immune to local privilege escalation because SUID is disabled by SELinux.
Why wrong: SELinux does not automatically disable SUID permissions.
- D
It allows the binary to execute with the privileges of the file owner (root), which can be exploited if the binary has flaws or drops to a shell.
SUID binaries execute with the privileges of the file owner, presenting a privilege escalation risk if vulnerable.