How to Inspect SSL Certificates and CSRs Safely Without Exposing Internal Data

·4 views

During a Kubernetes cluster migration, a misconfigured Certificate Signing Request missing wildcard Subject Alternative Names triggered a browser certificate error, highlighting a common operational pitfall. To diagnose such issues, many engineers paste CSRs or certificates into online decoder tools, which poses a significant security risk. Internal certificates often contain sensitive metadata such as hostnames, infrastructure endpoints, and private keys that can be logged or stored by third-party servers. X.509 certificates are ASN.1 data structures encoded in DER binary format and wrapped as PEM files, meaning they can be parsed locally without relying on remote tools. Understanding the underlying Tag-Length-Value structure of these certificates enables developers to inspect them safely in-house, avoiding exposure of internal network topology to unknown parties.

Read the full story at DEV Community

This is an AI-generated summary. ShortSingh links to the original source for the complete article.

Discussion (0)

How to Integrate Shieldon WAF with a PHP Framework for Better App Security

A Web Application Firewall (WAF) operates at the application layer of the OSI model, acting as a security barrier between HTTP requests and a web server to block threats like SQL injection, XSS, and cross-site forgery. WAFs function through allow-list and block-list policies that filter incoming traffic based on predefined rules. They come in three deployment types — host-based, network-based, and cloud-based — each with distinct trade-offs in cost, complexity, and customization. Shieldon is an open-source PHP-based WAF that detects and blocks suspicious activity, often using CAPTCHA challenges for verification. The integration guide walks developers through setting up Shieldon on a Slim PHP application using Composer and MySQL, and configuring it via the Shieldon control panel.

0 comments Read more at DEV Community

ProgrammingDEV Community ·

What Clean Data Really Means and Why Bad Data Costs Businesses Dearly

Clean data refers to information that is accurate, complete, and free of duplicates, errors, and missing fields across all business systems such as CRMs, HR platforms, and marketing tools. Poor data quality can derail marketing campaigns, skew dashboards, and erode trust in business decisions, costing organizations significant time and money. A 2017 study by Redman, Nagle, and Sammon found that 47% of freshly created records contained at least one critical error, with only 3% of departments meeting acceptable data quality standards. Widely cited cost estimates — including Gartner's $12.9 million annual figure and IBM's $3.1 trillion US economy claim — lack transparent methodology and should be treated with caution. Both the quality and quantity of data matter equally, as insufficient or inaccurate data prevents businesses from making reliable, informed decisions.

0 comments Read more at DEV Community

ProgrammingDEV Community ·

Salesbleed Shows How AI Agents Can Be Hijacked via Prompt Injection Attacks

A security issue dubbed 'Salesbleed' demonstrates how AI agents can be manipulated through prompt injection, where hidden instructions embedded in web content cause the agent to perform unintended actions. In the documented attack chain, an agentic Salesforce integration ingested untrusted web content and relayed malicious instructions into Slack, making phishing messages appear to originate from a trusted internal source. Security researchers stress this is not a Salesforce-specific flaw but a systemic architectural risk affecting any AI agent that reads untrusted content while holding write access to sensitive systems. The core danger lies in 'trust laundering': users are conditioned to trust internal automation messages, making agent-delivered threats far harder to detect than external phishing emails. Experts are urging platform teams to enforce least-privilege access, add human approval gates for cross-system actions, and treat all agent-read content as untrusted input.

0 comments Read more at DEV Community

ProgrammingDEV Community ·

PiKVM vs BeaconKVM: Two Ways to Build a Raspberry Pi IP KVM Compared

An IP KVM (Keyboard, Video, Mouse) device lets users control a remote machine via a browser, offering capabilities beyond standard remote desktop software, particularly for machines without an OS. PiKVM is a well-known open-source option that installs via a flashed image onto a Raspberry Pi 4B, offering rich features but requiring a dedicated device and manual VPN setup for remote access. BeaconKVM is a newer alternative from a networking company, with built-in remote access and a simpler setup process involving a QR code binding to a user account. Both solutions support a Raspberry Pi version, making DIY IP KVM builds more affordable compared to dedicated commercial hardware. The two products differ mainly in ease of remote access and setup complexity, catering to different user needs and technical skill levels.

0 comments Read more at DEV Community