openssl
Safeguard articles tagged "openssl" — guides, analysis, and best practices for software supply chain and application security.
18 articles
Inside the OpenSSL punycode bug: why CVE-2022-3602 wasn't Heartbleed
OpenSSL pre-announced a 'critical' flaw in October 2022. It shipped as HIGH severity. Here's the buffer overflow, the downgrade, and the safe patch path.
OpenSSL Punycode Overflow (CVE-2022-3602) Explained
CVE-2022-3602 was pre-announced as OpenSSL's next critical bug, then downgraded to high. Here is what the X.509 punycode buffer overflow actually does, why the panic cooled, and how to patch.
Heartbleed (CVE-2014-0160) Explained: When OpenSSL Leaked Memory to Anyone
CVE-2014-0160, Heartbleed, let remote attackers read up to 64KB of an OpenSSL server's memory per request — private keys, sessions, passwords. Here is the missing bounds check that caused it.
TLS Library Comparison: OpenSSL vs. LibreSSL vs. BoringSSL
Three forks of the same codebase, three different security philosophies. Here is how to choose the right TLS library for your project.
Heartbleed OpenSSL vulnerability retrospective
A decade later, Heartbleed (CVE-2014-0160) still explains why software supply chain visibility matters: severity, timeline, and remediation steps revisited.
CVE-2023-5363 Explained: The OpenSSL Key and IV Length Flaw
CVE-2023-5363 is an OpenSSL bug where key and IV length parameters get processed too late, risking confidentiality in GCM, CCM and OCB modes. Here is who is affected and how to fix it.
OpenSSL vs LibreSSL vs BoringSSL in 2026
A 2026 comparison of OpenSSL, LibreSSL, and BoringSSL on security posture, release cadence, FIPS posture, and which one to ship in which context.
CVE-2023-4807: The OpenSSL POLY1305 Flaw on Windows
A cryptographic MAC that silently trashes CPU registers: why CVE-2023-4807 only bites Windows builds of OpenSSL, what it can actually do, and which releases fix it.
Notable CVEs of 2023: A Practitioner's Roundup
From an OpenSSL IV-truncation flaw to a critical Babel code-execution bug, 2023's CVE crop is a good reminder that severity and blast radius don't always line up.
What Was the Heartbleed Bug
A deep dive into CVE-2014-0160 (Heartbleed): the OpenSSL heartbeat flaw, its severity, exploitation timeline, and how to remediate it today.
CVE-2025-15467 in OpenSSL CMS: Patch Posture & SBOM Response
OpenSSL CMS pre-auth stack buffer overflow scored CVSS 9.8. Mail servers, web servers, and anything that processes S/MIME need the fix. Defender playbook below.
TLS Library Comparison: OpenSSL vs BoringSSL vs LibreSSL vs rustls
Your TLS library choice has massive security implications. Here is an honest comparison of the major options and what each trade-off means.
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