add disclaimer and bump to 0.21

This commit is contained in:
Stéphane Lesimple 2018-01-09 18:52:21 +01:00
parent ab512687cf
commit 7222367f04
1 changed files with 36 additions and 1 deletions

View File

@ -8,7 +8,7 @@
# Stephane Lesimple
# Script configuration
@ -36,6 +36,35 @@ show_usage()
-v, --verbose Increase verbosity level
--batch Produce machine readable output
A false sense of security is worse than no security at all.
Please use the --disclaimer option to understand exactly what this script does.
cat <<EOF
This tool does its best to determine whether your system is immune (or has proper mitigations in place) for the
collectively named "speculative execution" vulnerabilities. It doesn't attempt to run any kind of exploit, and can't guarantee
that your system is secure, but rather helps you verifying whether your system has the known correct mitigations in place.
However, some mitigations could also exist in your kernel that this script doesn't know (yet) how to detect, or it might
falsely detect mitigations that in the end don't work as expected (for example, on backported or modified kernels).
Your system exposure also depends on your CPU. As of now, AMD and ARM processors are marked as immune to some or all of these
vulnerabilities (except some specific ARM models). All Intel processors manufactured since circa 1995 are thought to be vulnerable.
Whatever processor one uses, one might seek more information from the manufacturer of that processor and/or of the device
in which it runs.
The nature of the discovered vulnerabilities being quite new, the landscape of vulnerable processors can be expected
to change over time, which is why this script makes the assumption that all CPUs are vulnerable, except if the manufacturer
explicitely stated otherwise in a verifiable public announcement.
This tool has been released in the hope that it'll be useful, but don't use it to jump to conclusions about your security.
@ -214,6 +243,10 @@ while [ -n "$1" ]; do
exit 0
elif [ "$1" = "--disclaimer" ]; then
exit 0
@ -689,4 +722,6 @@ fi
_info "A false sense of security is worst than no security at all, see --disclaimer"
[ -n "$dumped_config" ] && rm -f "$dumped_config"