OpenSSL
testssl.sh
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OpenSSL | testssl.sh | |
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149 | 43 | |
24,142 | 7,628 | |
1.5% | - | |
9.9 | 8.8 | |
6 days ago | 9 days ago | |
C | Shell | |
Apache License 2.0 | GNU General Public License v3.0 only |
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OpenSSL
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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
- I am looking for a troubled/bad open source codebase
testssl.sh
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Badssl.com
You’re in luck because such a tool exists :) https://testssl.sh/
- Testing TLS/SSL Encryption
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Uncertain how to proceed with patching SSL and TLS issues in MacOS (Sweet32)
Run https://testssl.sh/ and see what ciphers are being offered.
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Changing SSL Wildcard Certificate
There is https://github.com/drwetter/testssl.sh utility. It can help diagnose issues (e.g. diffs between working and non-working sites).
- Specific SSL Ciphers Test
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SSL Diag Tool
For internal use, there's https://testssl.sh/
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Dovecot not offering TLSv1.2 after a few minutes
The current configuration allows for TLSv1 to TLSv1.3 connections. I can verify those using testssl.sh, the tests will succeed (although correctly mentioning, that TLSv1 and TLSv1.1 should be disabled). Running the tests again after about 5 minutes, the results are different. TLSv1.2 now shows "not offered and downgraded to a weaker protocol".
- How to combine pem file and 3 security certificates?
- oggi 2022-11-01 verrà rilasciata una vulnerabilità di livello CRITICAL su OpenSSL 3.0.x
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alternative to whatsmychaincert.com cli or gui
testssl.sh
What are some alternatives?
GnuTLS - GnuTLS
https-ssl-cert-check-zabbix - Script to check validity and expiration of TLS/SSL certificate on hosts. May be used with Zabbix or standalone.
Crypto++ - free C++ class library of cryptographic schemes
kubernetes-the-hard-way - Bootstrap Kubernetes the hard way. No scripts.
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-audit - SSH server auditing (banner, key exchange, encryption, mac, compression, compatibility, security, etc)
libsodium - A modern, portable, easy to use crypto library.
ssh-audit - SSH server & client security auditing (banner, key exchange, encryption, mac, compression, compatibility, security, etc)
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.
Wazuh - Wazuh - The Open Source Security Platform. Unified XDR and SIEM protection for endpoints and cloud workloads.
cfssl - CFSSL: Cloudflare's PKI and TLS toolkit
f5-azure-arm-templates - Azure Resource Manager Templates for quickly deploying BIG-IP services in Azure