https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=239724
Bug ID: 239724
Summary: The ping command doesn't randomize ICMP timestamps and
allows system time detection
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Keywords: patch
Severity: Affects Many People
Priority: ---
Component: bin
Assignee: [email protected]
Reporter: [email protected]
Created attachment 206377
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=206377&action=edit
ping(8) patch
The current implementation of ping(8) doesn't randomized ICMP timestamps. The
attached patch addresses this. Due to the applied randomized offset the system
time isn't guessable for an attacker and OS detection is nearly impossible.
This change was inspired by OpenBSDs ping(8) implementation.
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