greenbone/openvas-scanner
Oct 2024 – Oct 2025
13 Months active
Languages Used
NASLRustCMarkdownPythonTOMLC++YAML
Technical Skills
Code ReadabilityDocumentationNetwork ProgrammingProtocol HandlingRustSocket Programming
Christoph Krämer
PROFILE
Christoph Krämer
Christian Kraemer contributed extensively to the greenbone/openvas-scanner repository, building and refining core vulnerability scanning features over 13 months. He engineered robust NASL scripting enhancements, advanced cryptographic utilities, and improved network protocol handling, using Rust, C, and NASL scripting. Christian’s work included refactoring storage subsystems for maintainability, expanding package management support, and integrating new cryptographic primitives for secure assessments. He addressed complex issues in memory management, error handling, and API design, ensuring reliable scan results and scalable data processing. His technical approach emphasized code clarity, modularity, and test coverage, resulting in a more reliable, extensible, and secure scanning platform.
Overall Statistics
Feature vs Bugs
75%Features
Repository Contributions
68Total
Bugs
11
Commits
68
Features
33
Lines of code
16,782
Activity Months13
Work History
October 2025
9 Commits • 4 Features
Oct 1, 2025October 2025: Consolidated NASL scripting and cryptography enhancements for greenbone/openvas-scanner, improved data reliability, and reduced false positives. Key features include NASL Signature Functions for SMB2 and general signatures, cryptographic PRF functions, Diffie-Hellman utilities, and DES-EDE CBC support with a CBC refactor. Major bug fixes address data ingestion reliability and typo-driven noise in tooling. Overall impact includes expanded scripting power, stronger cryptographic capabilities, and more scalable data handling, enabling faster, more secure assessments and lower maintenance overhead. Technologies and skills demonstrated span NASL scripting, cryptography (SHA-based PRFs, DH), CBC mode refinements, and SQLite data handling optimizations.
9 Commits • 4 Features
Oct 1, 2025October 2025: Consolidated NASL scripting and cryptography enhancements for greenbone/openvas-scanner, improved data reliability, and reduced false positives. Key features include NASL Signature Functions for SMB2 and general signatures, cryptographic PRF functions, Diffie-Hellman utilities, and DES-EDE CBC support with a CBC refactor. Major bug fixes address data ingestion reliability and typo-driven noise in tooling. Overall impact includes expanded scripting power, stronger cryptographic capabilities, and more scalable data handling, enabling faster, more secure assessments and lower maintenance overhead. Technologies and skills demonstrated span NASL scripting, cryptography (SHA-based PRFs, DH), CBC mode refinements, and SQLite data handling optimizations.
October 2025
September 2025
7 Commits • 4 Features
Sep 1, 2025Monthly summary for 2025-09: The OpenVAS scanner repository delivered notable improvements in dependency management, cryptographic capability expansion, packaging accuracy, memory management, and code quality. These changes collectively increase security, reliability, and maintainability, reducing operational risk and enabling faster iteration.
September 2025
7 Commits • 4 Features
Sep 1, 2025Monthly summary for 2025-09: The OpenVAS scanner repository delivered notable improvements in dependency management, cryptographic capability expansion, packaging accuracy, memory management, and code quality. These changes collectively increase security, reliability, and maintainability, reducing operational risk and enabling faster iteration.
August 2025
7 Commits • 3 Features
Aug 1, 2025August 2025 monthly summary for greenbone/openvas-scanner highlighting notable feature deliveries, bug fixes, and ongoing improvements. Delivered Notus Scanning enhancements (renaming, error handling, and improved user-facing output), Rust code quality improvements, and environment/dependency updates to improve stability and security. A critical bug fix addressed the default plugins_timeout to align with expected plugin execution times.
7 Commits • 3 Features
Aug 1, 2025August 2025 monthly summary for greenbone/openvas-scanner highlighting notable feature deliveries, bug fixes, and ongoing improvements. Delivered Notus Scanning enhancements (renaming, error handling, and improved user-facing output), Rust code quality improvements, and environment/dependency updates to improve stability and security. A critical bug fix addressed the default plugins_timeout to align with expected plugin execution times.
August 2025
July 2025
6 Commits • 3 Features
Jul 1, 2025July 2025 performance summary for greenbone/openvas-scanner: Delivered three core enhancements that drive network discovery, scanning reliability, and developer usability, with meaningful API and docs improvements. Key outcomes include: - NASL Port State Retrieval Built-ins: Added Rust-based NASL built-ins to retrieve port states for TCP/UDP and expose scan preferences in NASL; enhances discovery precision and scan configurability. - Notus Scanning Framework with Improved Error Handling and API/Docs: Renamed LSC to Notus, introduced error handling and error codes, and updated API schema and documentation to clarify Notus results and scan reporting; improved reliability and integration clarity. - NASL Cryptographic Built-in: insert_hexzeros: Adds a cryptographic NASL built-in to insert a null byte after each non-null byte, enabling crypto scripts in NASL. Additionally, documentation and OpenAPI spec updates for Notus result improved developer experience and clarity of API usage. Technology and skills demonstrated: Rust-based NASL enhancements, API design, error handling patterns, OpenAPI documentation, and cross-repo collaboration.
July 2025
6 Commits • 3 Features
Jul 1, 2025July 2025 performance summary for greenbone/openvas-scanner: Delivered three core enhancements that drive network discovery, scanning reliability, and developer usability, with meaningful API and docs improvements. Key outcomes include: - NASL Port State Retrieval Built-ins: Added Rust-based NASL built-ins to retrieve port states for TCP/UDP and expose scan preferences in NASL; enhances discovery precision and scan configurability. - Notus Scanning Framework with Improved Error Handling and API/Docs: Renamed LSC to Notus, introduced error handling and error codes, and updated API schema and documentation to clarify Notus results and scan reporting; improved reliability and integration clarity. - NASL Cryptographic Built-in: insert_hexzeros: Adds a cryptographic NASL built-in to insert a null byte after each non-null byte, enabling crypto scripts in NASL. Additionally, documentation and OpenAPI spec updates for Notus result improved developer experience and clarity of API usage. Technology and skills demonstrated: Rust-based NASL enhancements, API design, error handling patterns, OpenAPI documentation, and cross-repo collaboration.
June 2025
4 Commits • 3 Features
Jun 1, 2025June 2025 highlights focused on strengthening Notus data processing, reporting, and API stability to improve vulnerability visibility and automation. Key deliverables include: (1) Notus results JSON structure refactor with new data models for vulnerable packages and advisories, updating table_driven_lsc to populate structured Notus data; (2) NASL-based Notus results reporting via a new security_lsc function, processing vulnerable package names/versions and publishing detailed reports to the internal knowledge base for tracking; (3) Notus API schema and documentation refinements, including changing NotusResult to an object keyed by OID, renaming fields within NotusVulnPkgs, and aligning the notus_results component to a direct object; (4) overall improvements to data flow and API consistency that enable faster triage and automation, reducing manual data wrangling and improving downstream reporting.
4 Commits • 3 Features
Jun 1, 2025June 2025 highlights focused on strengthening Notus data processing, reporting, and API stability to improve vulnerability visibility and automation. Key deliverables include: (1) Notus results JSON structure refactor with new data models for vulnerable packages and advisories, updating table_driven_lsc to populate structured Notus data; (2) NASL-based Notus results reporting via a new security_lsc function, processing vulnerable package names/versions and publishing detailed reports to the internal knowledge base for tracking; (3) Notus API schema and documentation refinements, including changing NotusResult to an object keyed by OID, renaming fields within NotusVulnPkgs, and aligning the notus_results component to a direct object; (4) overall improvements to data flow and API consistency that enable faster triage and automation, reducing manual data wrangling and improving downstream reporting.
June 2025
May 2025
7 Commits • 3 Features
May 1, 2025May 2025 monthly summary for greenbone/openvas-scanner: Focused delivery on Notus integration, NASL interpreter enhancements for port handling, and script memory usage control. These updates improve scan reliability, configurability, and safety, aligning technical achievements with measurable business value.
May 2025
7 Commits • 3 Features
May 1, 2025May 2025 monthly summary for greenbone/openvas-scanner: Focused delivery on Notus integration, NASL interpreter enhancements for port handling, and script memory usage control. These updates improve scan reliability, configurability, and safety, aligning technical achievements with measurable business value.
April 2025
4 Commits • 2 Features
Apr 1, 2025April 2025 (2025-04) monthly summary for greenbone/openvas-scanner. Focused on delivering cross-manager version comparison improvements, Arch ALPM support in Notus vulnerability scanner, and robustness in OpenVASd configuration loading. These efforts expand platform coverage, improve vulnerability detection accuracy, and enhance reliability. Key features delivered: - Unified Cross-Manager Version Comparison and Ebuild Parsing: Consolidates version comparison across ALPM, Deb, EBuild, RPM, and Slack; introduces robust ebuild parsing for complex paths and suffixes; new Suffix enum to correctly parse and compare versions. Commits: e83d762b7ecbbcc280e95a57695e85e99e805a01; f9e7dde1b17d27ca36c4f3feea1355cac6df8ef7 - Arch Linux (ALPM) Package Support in Notus Vulnerability Scanner: Adds Arch Linux package management support to Notus vulnerability scanner by introducing an Alpm representation and parsing logic for Arch versioning, enabling vulnerability detection for ALPM-managed packages. Commit: 71cf858268e2fa5b37649bc49b5476df00ea5db0 - OpenVASd Configuration Loading Robustness: Improves OpenVASd configuration loading by explicitly checking for configuration file existence and handling missing files gracefully; parses files when present and panics on parse failures, improving error handling and clarity. Commit: 66c278fedc566bc86961ef5a080a130d69f30063 Major bugs fixed: - OpenVASd Configuration Loading Robustness (see above) Overall impact and accomplishments: - Broadened vulnerability detection coverage to Arch ALPM; improved version comparison accuracy; enhanced reliability and error visibility; laid groundwork for broader cross-manager integration across the Notus/OpenVAS ecosystem. Technologies/skills demonstrated: - ALPM/Arch package management parsing, ebuild parsing and version comparison, regex enhancements, Suffix enum design, robust configuration parsing, Notus vulnerability scanner integration.
4 Commits • 2 Features
Apr 1, 2025April 2025 (2025-04) monthly summary for greenbone/openvas-scanner. Focused on delivering cross-manager version comparison improvements, Arch ALPM support in Notus vulnerability scanner, and robustness in OpenVASd configuration loading. These efforts expand platform coverage, improve vulnerability detection accuracy, and enhance reliability. Key features delivered: - Unified Cross-Manager Version Comparison and Ebuild Parsing: Consolidates version comparison across ALPM, Deb, EBuild, RPM, and Slack; introduces robust ebuild parsing for complex paths and suffixes; new Suffix enum to correctly parse and compare versions. Commits: e83d762b7ecbbcc280e95a57695e85e99e805a01; f9e7dde1b17d27ca36c4f3feea1355cac6df8ef7 - Arch Linux (ALPM) Package Support in Notus Vulnerability Scanner: Adds Arch Linux package management support to Notus vulnerability scanner by introducing an Alpm representation and parsing logic for Arch versioning, enabling vulnerability detection for ALPM-managed packages. Commit: 71cf858268e2fa5b37649bc49b5476df00ea5db0 - OpenVASd Configuration Loading Robustness: Improves OpenVASd configuration loading by explicitly checking for configuration file existence and handling missing files gracefully; parses files when present and panics on parse failures, improving error handling and clarity. Commit: 66c278fedc566bc86961ef5a080a130d69f30063 Major bugs fixed: - OpenVASd Configuration Loading Robustness (see above) Overall impact and accomplishments: - Broadened vulnerability detection coverage to Arch ALPM; improved version comparison accuracy; enhanced reliability and error visibility; laid groundwork for broader cross-manager integration across the Notus/OpenVAS ecosystem. Technologies/skills demonstrated: - ALPM/Arch package management parsing, ebuild parsing and version comparison, regex enhancements, Suffix enum design, robust configuration parsing, Notus vulnerability scanner integration.
April 2025
March 2025
9 Commits • 4 Features
Mar 1, 2025Concise monthly summary for 2025-03 focusing on greenbone/openvas-scanner. Key accomplishments include a storage subsystem overhaul with InMemoryStorage and ResultCatcher, NASL module architecture improvements with a new ftp_get_pasv_port utility, CISA KEV vulnerability data support integration, KbKey enum restructuring for clarity, and a Deb/RPM package name/version regex fix with accompanying docs. Also completed tests updates and documentation alignment to reflect storage changes. Overall impact: more reliable scan results, enhanced vulnerability data coverage, cleaner and more scalable codebase, and improved packaging parsing accuracy, translating to tangible business value in security posture and maintenance efficiency.
March 2025
9 Commits • 4 Features
Mar 1, 2025Concise monthly summary for 2025-03 focusing on greenbone/openvas-scanner. Key accomplishments include a storage subsystem overhaul with InMemoryStorage and ResultCatcher, NASL module architecture improvements with a new ftp_get_pasv_port utility, CISA KEV vulnerability data support integration, KbKey enum restructuring for clarity, and a Deb/RPM package name/version regex fix with accompanying docs. Also completed tests updates and documentation alignment to reflect storage changes. Overall impact: more reliable scan results, enhanced vulnerability data coverage, cleaner and more scalable codebase, and improved packaging parsing accuracy, translating to tangible business value in security posture and maintenance efficiency.
February 2025
2 Commits • 2 Features
Feb 1, 2025February 2025 monthly summary for greenbone/openvas-scanner focusing on storage robustness and result handling improvements. Delivered two key features with a strong emphasis on maintainability, extensibility, and reliability of OpenVAS results.
2 Commits • 2 Features
Feb 1, 2025February 2025 monthly summary for greenbone/openvas-scanner focusing on storage robustness and result handling improvements. Delivered two key features with a strong emphasis on maintainability, extensibility, and reliability of OpenVAS results.
February 2025
January 2025
2 Commits • 1 Features
Jan 1, 2025Monthly summary for 2025-01 for greenbone/openvas-scanner focusing on delivered features, fixed bugs, and overall impact. Key achievements include the introduction of Open Port Discovery and KB Transport Logging, and a critical fix to TCP socket retry logic that prevents infinite loops under higher max attempts. The work enhanced port discovery accuracy, KB data integration, and scanner reliability, supporting better vulnerability assessment outcomes and reduced operational risk. Technologies demonstrated include NASL scripting (get_host_open_port, get_port_transport), KB pattern queries, transport protocol tracking for sockets, and retriever trait extensions.
January 2025
2 Commits • 1 Features
Jan 1, 2025Monthly summary for 2025-01 for greenbone/openvas-scanner focusing on delivered features, fixed bugs, and overall impact. Key achievements include the introduction of Open Port Discovery and KB Transport Logging, and a critical fix to TCP socket retry logic that prevents infinite loops under higher max attempts. The work enhanced port discovery accuracy, KB data integration, and scanner reliability, supporting better vulnerability assessment outcomes and reduced operational risk. Technologies demonstrated include NASL scripting (get_host_open_port, get_port_transport), KB pattern queries, transport protocol tracking for sockets, and retriever trait extensions.
December 2024
3 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for greenbone/openvas-scanner (2024-12). Focus on business value and technical achievements, highlighting delivered features/bug fixes, impact, and technical skills demonstrated.
3 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for greenbone/openvas-scanner (2024-12). Focus on business value and technical achievements, highlighting delivered features/bug fixes, impact, and technical skills demonstrated.
December 2024
November 2024
6 Commits • 2 Features
Nov 1, 2024In 2024-11, greenbone/openvas-scanner delivered key feature enhancements, improved version handling robustness, and expanded test coverage, driving reliability and maintainability for enterprise deployments. The changes enhance NASL scripting capabilities, improve privileged socket handling, and ensure more accurate version metadata across packaging and notus parsing. These updates reduce risk in parser behavior, streamline release metadata, and provide clearer signals to operators about version provenance and compatibility.
November 2024
6 Commits • 2 Features
Nov 1, 2024In 2024-11, greenbone/openvas-scanner delivered key feature enhancements, improved version handling robustness, and expanded test coverage, driving reliability and maintainability for enterprise deployments. The changes enhance NASL scripting capabilities, improve privileged socket handling, and ensure more accurate version metadata across packaging and notus parsing. These updates reduce risk in parser behavior, streamline release metadata, and provide clearer signals to operators about version provenance and compatibility.
October 2024
2 Commits • 1 Features
Oct 1, 2024Monthly summary for 2024-10 focusing on key accomplishments and impact for the greenbone/openvas-scanner project. Highlighted work includes feature documentation improvements for the Network Module and a critical fix to NASL socket timeout handling, contributing to reliability in network scanning workflows.
2 Commits • 1 Features
Oct 1, 2024Monthly summary for 2024-10 focusing on key accomplishments and impact for the greenbone/openvas-scanner project. Highlighted work includes feature documentation improvements for the Network Module and a critical fix to NASL socket timeout handling, contributing to reliability in network scanning workflows.
October 2024
Activity
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Quality Metrics
Correctness90.2%
Maintainability89.6%
Architecture85.6%
Performance81.0%
AI Usage20.2%
Skills & Technologies
Programming Languages
CC++DockerfileMarkdownNASLPythonRustTOMLYAML
Technical Skills
API DesignAPI DocumentationAPI IntegrationBackend DevelopmentBig Number ArithmeticBug FixBug FixingCC ProgrammingC programmingC++CI/CDCargoCode CleanupCode Linting
Repositories Contributed To
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