warning system Archives

Tech Optimizer

April 2, 2025

Improve PostgreSQL performance using the pgstattuple extension

PostgreSQL is an open-source relational database management system known for its extensibility, which allows developers to enhance its capabilities through various extensions and plugins. The pgstattuple extension provides detailed statistics at the tuple level from PostgreSQL tables and indexes, revealing key metrics such as the number of live tuples, dead tuples, average length of live tuples, total free space, and percentages of free space and dead tuples. These metrics help database administrators identify potential health and performance issues, such as excessive table bloat or index fragmentation. Both Amazon Aurora and Amazon RDS support the pgstattuple extension, which can be activated using the command CREATE EXTENSION pgstattuple;. Functions like pgstattuple(relation) and pgstatindex(index) can be used to analyze physical storage and index statistics. Bloat occurs when unused space is left behind after UPDATE and DELETE operations, and the autovacuum process in PostgreSQL automates the cleanup of dead tuples. However, if autovacuum fails, manual intervention may be necessary. Regular monitoring of bloat is essential for maintaining performance, and metrics from pgstattuple can help optimize autovacuum settings. The pg_cron extension can automate VACUUM operations to manage bloat proactively. Index bloat can also be detected using pgstatindex, and significantly bloated indexes can be rebuilt using REINDEX or pg_repack. Best practices for using pgstattuple include estimating bloat with check_postgres, analyzing physical storage, monitoring dead_tuple_percent, and avoiding interference on highly active tables.

AppWizard

April 1, 2025

Beware new Google ‘yellow warning’ that saves you from costly nightmare

Google has introduced a yellow warning banner in the Google Play Store to alert Android users about apps that are frequently uninstalled. This banner indicates that an app may not be meeting user expectations and could be due to poor functionality, excessive advertisements, or inflated costs. Additionally, Google has implemented two other notifications: one indicating lower user engagement with an app and another showing fewer users compared to other apps. These features aim to help users make more informed app choices and avoid potentially harmful applications. Google Play Protect is also available to scan downloaded apps for security, including those from outside the Play Store. Users can enable settings to improve harmful app detection, enhancing overall safety in the app ecosystem.

Winsage

February 12, 2025

Microsoft takes it easy on February’s Patch Tuesday

Microsoft released a total of 63 patches in February, including six previously released ones. Two vulnerabilities, CVE-2025-21418 (CVSS 7.8) and CVE-2025-21391 (CVSS 7.1), are actively exploited and require local access and authentication for exploitation. CVE-2025-21418 affects the Windows Ancillary Function Driver for Winsock, allowing attackers to gain SYSTEM-level privileges on Windows 10, 11, and various Windows Server versions. CVE-2025-21391 affects Windows Storage, enabling local attackers to delete files under certain conditions. Two publicly known vulnerabilities, CVE-2025-21194 (CVSS 7.1) and CVE-2025-21377 (CVSS 6.5), have not yet been exploited. CVE-2025-21194 exposes PCs to potential hypervisor and secure kernel compromises, while CVE-2025-21377 risks leaking a user's NTLMv2 hash with minimal user interaction. CVE-2025-21198, rated at CVSS 9.0, allows remote code execution in high-performance computing infrastructures, requiring network access to a targeted HPC cluster. Excel users should address five patches rated at 7.8, particularly CVE-2025-21381, which has potential for remote code execution through local attack vectors. As of February 11, administrators must configure the StrongCertificateBindingEnforcement registry key on domain controllers to avoid transitioning to Full Enforcement mode by February 2025. CVE-2025-21177 (CVSS 8.7) has been fully mitigated by Microsoft. Adobe released 45 updates, with 31 addressing vulnerabilities in Adobe Commerce, and critical patches for InDesign and Illustrator. SAP issued 21 patches affecting NetWeaver and addressing cross-site scripting issues. Fortinet released security updates for various products, including a critical authentication bypass vulnerability in FortiOS and FortiProxy (CVSS 9.6).

AppWizard

November 26, 2024

The Google Play Store Will Soon Warn You Before You Download a Bad App

Google may soon implement a feature in the Play Store that warns users about subpar apps. Investigations revealed three potential warning messages: 1. This app is frequently uninstalled compared to similar apps on Play. 2. Play has limited user data about this app. 3. This app has few active users compared to others on Play. These warnings would be based on uninstall rates, availability of user data, and the number of active users relative to similar apps. The notifications would be integrated into the app's detail page, providing users with insights before downloading. This feature is still in the conceptual phase, as it was discovered in the code of the Play Store.

Winsage

October 12, 2024

Microsoft Warns Millions Of Windows Users—Change Your Browser As New Attacks Underway

Microsoft has issued a warning to Windows users about increasing attacks that exploit legitimate file hosting services, using tactics to evade security measures. These attacks involve fraudulent websites designed to harvest user credentials, prompting Microsoft to recommend the use of Microsoft Edge, which integrates with Microsoft Defender SmartScreen to block malicious sites. Microsoft previously advised Chrome users to update or stop using the browser due to a zero-day vulnerability, encouraging a shift to Edge. The attacks leverage trusted file-sharing platforms like Dropbox and OneDrive, deceiving users into opening malicious files. Microsoft emphasizes using Edge with conditional access policies and Microsoft Defender for enhanced security. Additionally, Microsoft is developing a privacy-preserving ads API for Edge, aiming to improve user privacy while addressing the challenges of third-party cookie tracking. This new API is currently in limited preview and requires manual activation in specific regions.

Winsage

October 9, 2024

Microsoft Warns Millions Of Windows Users—Change Your Browser To Stop New Attacks

Microsoft has issued a warning to Windows users about an increase in sophisticated attacks that use legitimate file hosting services to evade security measures. These attacks often involve fraudulent websites designed to steal user credentials, exploiting trusted platforms like Dropbox, SharePoint, and OneDrive. Microsoft recommends using Microsoft Edge, which can automatically block malicious websites through Microsoft Defender SmartScreen. The company has also advised enterprises to promote Edge and implement conditional access policies to enhance security. Recent trends show attackers manipulating enterprise security systems by using files with restricted access and view-only settings to deliver phishing emails. The ultimate goal of these attacks is typically the theft of organizational credentials for financial gain.

AppWizard

October 7, 2024

Here’s Google Play Store’s watch face incompatibility warning in action (APK teardown)

The Google Play Store is set to introduce two new features for Android users: 1. Google Play Points will be displayed on the app listing page, allowing users to see their accumulated points easily. These points can be earned through purchases and redeemed for discounts or Google Play Credit. 2. A warning system will alert users when downloading apps with Wear OS watch faces that haven't been updated to the new Watch Face Format. This alert will only apply to incompatible apps and will not affect those already compliant or devices that launched with Wear OS 5.

AppWizard

April 9, 2024

Google Messages Apps Can Now Warn Users About Spam Links In SMS: How It Works – News18

Google Messages app is set to introduce a new security feature that will alert users with a pop-up warning when they receive a link from an unknown sender to protect them from phishing and scamming attempts.