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Merge branch 'Kicksecure:master' into docs

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raja-grewal 2024-08-16 11:45:43 +10:00 committed by GitHub
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4 changed files with 62 additions and 9 deletions
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5
README.md
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@ -79,9 +79,8 @@ Various networking components of the TCP/IP stack are hardened for IPv4/6.
- Enable reverse path filtering (source validation) of packets received
from all interfaces to prevent IP spoofing.
- Disable ICMP redirect acceptance and redirect sending messages to
prevent man-in-the-middle attacks and minimize information disclosure. If
ICMP redirect messages are permitted, only do so from approved gateways.
- Disable ICMP redirect acceptance and redirect sending messages to prevent
man-in-the-middle attacks and minimize information disclosure.
- Ignore ICMP echo requests to prevent clock fingerprinting and Smurf attacks.

46
changelog.upstream
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@ -1,3 +1,31 @@
commit 9e61e37c17524b57f185b796f2ac19ba193205a8
Merge: 89e816d dfd1c97
Author: Patrick Schleizer <adrelanos@whonix.org>
Date: Thu Aug 15 13:47:33 2024 -0400
Merge remote-tracking branch 'github-kicksecure/master'
commit dfd1c97168249b229495cbd873d4d8493e244663
Merge: 89e816d ec3038c
Author: Patrick Schleizer <adrelanos@whonix.org>
Date: Thu Aug 15 13:46:30 2024 -0400
Merge pull request #248 from raja-grewal/secure_redirects
Re-enable (default) `secure_redirects` for ICMP redirect messages
commit ec3038c7bc625f6c8eddb753ffe295ff2697a717
Author: Raja Grewal <rg_public@proton.me>
Date: Wed Aug 7 13:48:53 2024 +1000
Clarify `secure_redirects`
commit 89e816dda6c5a00512b276071c4d9fe108ee63b5
Author: Patrick Schleizer <adrelanos@whonix.org>
Date: Tue Aug 6 14:01:39 2024 +0000
bumped changelog version
commit 967f9e257b09bc73ddb579292d507f7cb9832643
Merge: fa90918 a25aaf9
Author: Patrick Schleizer <adrelanos@whonix.org>
@ -65,6 +93,12 @@ Date: Mon Aug 5 14:27:17 2024 +1000
Enable `slab_debug=FZ`
commit 4f7f82016015f61002ac8f778b61968c572dc7dc
Author: Raja Grewal <rg_public@proton.me>
Date: Mon Aug 5 14:16:33 2024 +1000
Add reference
commit fa9091869d417c6494840d0cb32623037d70c8be
Merge: 06f0c27 725118c
Author: Patrick Schleizer <adrelanos@whonix.org>
@ -197,6 +231,12 @@ Date: Sat Jul 27 12:13:18 2024 -0400
output
commit 144545762674e914046bb94100237329320e8ece
Author: Raja Grewal <rg_public@proton.me>
Date: Sat Jul 27 14:00:30 2024 +1000
Show details regarding `secure_redirects` (again)
commit 73979d4342dae2017be52d5182bb66fa28be398d
Author: Raja Grewal <rg_public@proton.me>
Date: Sat Jul 27 13:28:59 2024 +1000
@ -601,6 +641,12 @@ Date: Wed Jul 24 09:13:48 2024 -0400
Merge remote-tracking branch 'ben-grande/fuzz'
commit 88c88187f2909322211cc08598717068ea7cf1d1
Author: Raja Grewal <rg_public@proton.me>
Date: Wed Jul 24 17:26:50 2024 +1000
Re-enable (default) `secure_redirects` for ICMP redirect messages
commit 8be21b6eff40fdd3909ef63468463fc52e8bf45f
Author: Ben Grande <ben.grande.b@gmail.com>
Date: Tue Jul 23 19:36:12 2024 +0200

6
debian/changelog vendored
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@ -1,3 +1,9 @@
security-misc (3:38.9-1) unstable; urgency=medium
* New upstream version (local package).
-- Patrick Schleizer <adrelanos@whonix.org> Thu, 15 Aug 2024 17:51:18 +0000
security-misc (3:38.8-1) unstable; urgency=medium
* New upstream version (local package).

14
usr/lib/sysctl.d/990-security-misc.conf
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@ -284,8 +284,14 @@ net.ipv4.conf.default.rp_filter=1
## Disable ICMP redirect acceptance and redirect sending messages.
## Prevents man-in-the-middle attacks and minimizes information disclosure.
## If ICMP redirects are permitted, accept messages only through approved gateways (kernel default).
## Approving gateways requires the managing of a default gateway list.
##
## https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/6/html/security_guide/sect-security_guide-server_security-disable-source-routing#sect-Security_Guide-Server_Security-Disable-Source-Routing
## https://www.frozentux.net/ipsysctl-tutorial/chunkyhtml/theconfvariables.html
## https://www.debian.org/doc/manuals/securing-debian-manual/network-secure.en.html
## https://askubuntu.com/questions/118273/what-are-icmp-redirects-and-should-they-be-blocked
## https://github.com/Kicksecure/security-misc/pull/248
##
net.ipv4.conf.all.accept_redirects=0
net.ipv4.conf.default.accept_redirects=0
@ -293,12 +299,8 @@ 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
## Accept ICMP redirect messages only for approved gateways.
## If ICMP redirect messages are permitted, only useful if managing a default gateway list.
##
net.ipv4.conf.all.secure_redirects=0
net.ipv4.conf.default.secure_redirects=0
#net.ipv4.conf.all.secure_redirects=1
#net.ipv4.conf.default.secure_redirects=1
## Ignore ICMP echo requests.
## Prevents clock fingerprinting through ICMP timestamps and Smurf attacks.