apparmor.d
OpenSSL
apparmor.d | OpenSSL | |
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24 | 150 | |
365 | 24,254 | |
- | 1.1% | |
9.9 | 9.9 | |
5 days ago | 1 day ago | |
Go | C | |
GNU General Public License v3.0 only | Apache License 2.0 |
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apparmor.d
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Sandboxing All the Things with Flatpak and BubbleBox
If anyone want to look further into sandboxing applications on Linux, you can also look at AppArmor and the sandboxing features built into systemd.
I love this repository for bases for AppArmor profiles[1], really good work. Never found a repository as good for systemd, but there are a few around.
[1] https://github.com/roddhjav/apparmor.d
- Anyone writes AppArmor profiles?
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AppArmor and Profile Inheritance
Then, categorize all your script zoo: maybe some script group want to only read the data, while some need to write, maybe one group needs to use certain set of binaries, and other group - others.
- How would you sandbox shady PDF files from the internet?
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OpenSUSE Tumbleweed Security – firewall, fail2ban, apparmor
You could utilize some profiles from apparmor.d repo, but you should be slightly aware how it works (disclaimer: I'm the contributor).
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FOSS alternative to Teamviewer
Regardless, I wrote an AppArmor profile so it couldn't happen again.
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Cybersec student here. How it possible that Linux is more secure than Windows?
Maintainer's response.
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MacOS-like support for directory access control on Linux, *per app*
There is a project in early development: apparmor.d. Adopting some or all profiles will do the job. To use it smoothly, basic AppArmor knowledge is required. (I'm the contributor)
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AppArmor and Firefox: Does it actually work?
Dependent on the OS and Firefox distribution. I can advertise profile that I co-maintain. It uses non-standard tunables, which will require some README reading to get them into the system.
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SELinux VS AppArmor - go!
Red Hat based distros come preconfigured with a lot of SELinux policies. With AppArmor, you get basically nothing. There is a project I also contribute to from time to time, that gives you a lot more policies, but this is entirely out-of-tree (https://github.com/roddhjav/apparmor.d).
OpenSSL
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RVM Ruby 2.6.0 — built with custom openssl version on Ubuntu 22.04
ENV OPENSSL_PREFIX=/opt/openssl ENV SSL_CERT_FILE=/etc/ssl/certs/ca-certificates.crt WORKDIR /tmp RUN git clone --branch OpenSSL_1_0_2n https://github.com/openssl/openssl.git RUN cd openssl RUN ./config shared --prefix=$OPENSSL_PREFIX --openssldir=$OPENSSL_PREFIX/ssl RUN make RUN make install RUN rvm install 2.6.0 -C --with-openssl-dir=$OPENSSL_PREFIX ENV PATH /usr/local/rvm/bin:$PATH RUN rvm --default use ruby-2.6.0 ENV PATH /usr/local/rvm/bin:/usr/local/rvm/rubies/ruby-2.6.0/bin:$PATH ENV GEM_HOME /usr/local/rvm/rubies/ruby-2.6.0/lib/ruby/gems/2.6.0
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Heartbleed and XZ Backdoor Learnings: Open Source Infrastructure Can Be Improved Efficiently With Moderate Funding
Today, April 7th, 2024, marks the 10-year anniversary since CVE-2014-0160 was published. This security vulnerability known as "Heartbleed" was a flaw in the OpenSSL cryptography software, the most popular option to implement Transport Layer Security (TLS). In more layman's terms, if you type https:// in your browser address bar, chances are high that you are interacting with OpenSSL.
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Ask HN: How does the xz backdoor replace RSA_public_decrypt?
At this point I pretty much understand the entire process on how the xz backdoor came to be: its execution stages, extraction from binary "test" files etc. But one thing puzzles me: how can the ifunc mechanism be used to replace something like RSA_public_decrypt? Granted this probably stems from my lack of understanding of ifunc, but I was under the impression that in order for the ifunc mechanism to work in your code, you have to explicitly mark specific function with multiple implementations with __attribute__ ((ifunc ("the_resolver_function"))). Looking at the source code of the RSA function in question, ifunc attribute isn't present:
https://github.com/openssl/openssl/blob/master/crypto/rsa/rsa_crpt.c#L51
So how does the backdoor actually replace the call? Does this means that the ifunc mechanism can be used to override pretty much anything on the system?
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Use of HTTPS Resource Records
OpenSSL and Go crypt/tls has no support yet, so none of the webservers that depend on them support it. Apache, Nginx, and Caddy, they all need upstream ECH support first.
- https://github.com/openssl/openssl/issues/7482
- https://github.com/openssl/openssl/pull/22938
- https://github.com/golang/go/issues/63369
- openssl-3.2.0 released
- Large performance degradation in OpenSSL 3
- OpenSSL 3.2 Alpha 2
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Encrypted Client Hello – the last puzzle piece to privacy
If I'm understanding the draft correctly, I think the webserver you're hosting your sites on would need it implemented as it requires private keys and ECH configuration. In the example of nginx since it uses openssl, openssl would need to implement it. I found an issue on their Github but it's still open: https://github.com/openssl/openssl/issues/7482
- eBPF Practical Tutorial: Capturing SSL/TLS Plain Text Data Using uprobe
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OpenSSL Versions... whats the plan here
I confirmed that the systm was on 1.1.1f with openssl version command. Hmm...... I check the openssl version in the repo with apt list... LOL package names wernt helpful. finally went to the repo pages and found that its still on 1.1.1f, https://launchpad.net/ubuntu/+source/openssl. Meenwhile I looked up the version history on https://www.openssl.org/ and saw that 1.1.1v was released at the beginning of this month... ok. I can understand it it was out less then 30 days. I looked up when f came out, end of MARCH 2020. NEARLY 3-1/2 YEARS
What are some alternatives?
kubernetes-ingress - NGINX and NGINX Plus Ingress Controllers for Kubernetes
GnuTLS - GnuTLS
UBUNTU20-CIS - Ansible role for Ubuntu 2004 CIS Baseline
Crypto++ - free C++ class library of cryptographic schemes
hardentools - Hardentools simply reduces the attack surface on Microsoft Windows computers by disabling low-hanging fruit risky features.
mbedTLS - An open source, portable, easy to use, readable and flexible TLS library, and reference implementation of the PSA Cryptography API. Releases are on a varying cadence, typically around 3 - 6 months between releases.
ssh-p2p - ssh p2p tunneling server and client
libsodium - A modern, portable, easy to use crypto library.
kloak - Keystroke-level online anonymization kernel: obfuscates typing behavior at the device level.
LibreSSL - LibreSSL Portable itself. This includes the build scaffold and compatibility layer that builds portable LibreSSL from the OpenBSD source code. Pull requests or patches sent to [email protected] are welcome.
shadowsocks-gtk-rs - A desktop GUI frontend for shadowsocks-rust client implemented with gtk-rs.
cfssl - CFSSL: Cloudflare's PKI and TLS toolkit