Recent PHP, Node.js and Certificate Authority Flaws Highlight Risks Beyond Application Code

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Several recent security incidents have shown that secure application code alone does not guarantee a secure system. Two critical PHP request-handling vulnerabilities, disclosed on October 21, could let an unauthenticated attacker execute code under certain conditions. Node.js also issued a security release that addressed a TLS certificate-validation flaw and a Brotli decoder memory corruption bug. Separately, eight intermediate certificate authority certificates operated by eMudhra were found to use dangerously weak private keys, prompting Mozilla to block them and the certificates to be revoked. No public evidence shows the keys were maliciously exploited before discovery, but the episode underscores the risk to HTTPS trust chains.

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