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Merge remote-tracking branch 'github/master'

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Patrick Schleizer 2020-09-28 10:24:59 -04:00
commit 77d461ec08
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8
etc/modprobe.d/30_security-misc.conf
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@ -44,6 +44,14 @@ install appletalk /bin/false
install psnap /bin/false
install p8023 /bin/false
install p8022 /bin/false
install can /bin/false
install atm /bin/false
# Disable uncommon filesystems to reduce attack surface
install cramfs /bin/false
install vfat /bin/false
install squashfs /bin/false
install udf /bin/false
## Blacklists the vivid kernel module as it's only required for
## testing and has been the cause of multiple vulnerabilities.

13
etc/sysctl.d/30_security-misc.conf
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@ -82,6 +82,8 @@ net.ipv6.conf.default.accept_redirects=0
## Disables ICMP redirect sending.
net.ipv4.conf.all.send_redirects=0
net.ipv4.conf.default.send_redirects=0
net.ipv6.conf.all.accept_redirects=0
net.ipv6.conf.default.accept_redirects=0
## Ignores ICMP requests.
net.ipv4.icmp_echo_ignore_all=1
@ -92,6 +94,8 @@ net.ipv4.tcp_syncookies=1
## Disable source routing.
net.ipv4.conf.all.accept_source_route=0
net.ipv4.conf.default.accept_source_route=0
net.ipv6.conf.all.accept_source_route=0
net.ipv6.conf.default.accept_source_route=0
## Enable reverse path filtering to prevent IP spoofing and
## mitigate vulnerabilities such as CVE-2019-14899.
@ -145,3 +149,12 @@ vm.unprivileged_userfaultfd=0
## - https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Performance_Tuning_Guide/s-memory-tunables.html
## - https://en.wikipedia.org/wiki/Swappiness
vm.swappiness=1
## Disallow kernel profiling by users without CAP_SYS_ADMIN
## https://www.kernel.org/doc/Documentation/sysctl/kernel.txt
kernel.perf_event_paranoid=3
# Do not accept router advertisments
net.ipv6.conf.all.accept_ra=0
net.ipv6.conf.default.accept_ra=0