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misc: Add some link examples to sysctl.conf (catch up) 

--------------- Original Master Branch Commit Message:
Adds both examples to the sample sysctl.conf configuration file
to enable link protection for both hard and soft links.

Most kernels probably have this enabled anyhow.

References:
 https://bugs.debian.org/889098
 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-18078
 561ec64ae6

Signed-off-by: Jim Warner <james.warner@comcast.net>
This commit is contained in:
Jim Warner 2018-04-11 00:00:00 -05:00 committed by Craig Small
parent fb44ecf12f
commit 479b9e54b1
1 changed files with 5 additions and 0 deletions
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5
sysctl.conf
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@ -57,3 +57,8 @@ net/ipv4/icmp_echo_ignore_broadcasts =1
# This limits PID values to 4 digits, which allows tools like ps
# to save screen space.
kernel/pid_max=10000
# Protects against creating or following links under certain conditions
# See https://www.kernel.org/doc/Documentation/sysctl/fs.txt
#fs.protected_hardlinks = 1
#fs.protected_symlinks = 1