GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. In version 4.4.0, an unauthenticated remote BGP peer can trigger a fatal panic in GoBGP by sending a specially crafted BGP UPDATE message. When the server receives a message with inconsistent attribute lengths, it improperly handles the internal state transition to a "withdraw" action, leading to a nil pointer dereference in the AdjRib.Update function. This causes the entire GoBGP process to crash, resulting in a complete loss of service availability. This issue has been patched in version 4.5.0.
Casky was already ahead
This CVE exploits attack patterns that Casky's 312matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.
GoBGP 4.4.0 contains a critical vulnerability where unauthenticated remote BGP peers can crash the entire routing process by sending malformed BGP UPDATE messages with inconsistent attribute lengths. This vulnerability is particularly severe because BGP is foundational to internet routing—any BGP speaker processing untrusted peer messages is at risk of denial of service. Organizations running GoBGP as a route reflector, edge router, or in any BGP peering scenario face potential network outages if exploited. The vulnerability stems from improper state management in the AdjRib.Update function, where the system fails to validate message structure before performing operations that assume valid internal state, resulting in nil pointer dereference and process termination.
Casky's 312 matched skills leverage Claude's reasoning capabilities to detect the attack patterns underlying this vulnerability across TA0040 (Impact) and TA0011 (Command and Control) techniques. Practitioners would observe detections aligned with resource exhaustion patterns—specifically, abnormal BGP peer behavior sending malformed messages that correlate with process crashes or unexpected BGP session resets. The extended reasoning capability identifies the specific indicator chain: receipt of BGP UPDATE messages with attribute length inconsistencies followed by immediate daemon termination or unavailability. Detection would surface anomalies in BGP message parsing logs, unexpected state transitions in routing table updates, and correlation between specific peer activity and service degradation—enabling teams to isolate compromised or malicious BGP peers before network-wide impact occurs.
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These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-42285.
Casky has 312 skills that investigate the attack patterns behind CVE-2026-42285. Run one and get CVSS-scored findings in 3 minutes.
Run the skill that detects this →analyzing-campaign-attribution-evidence
threat intelligence · low
analyzing-certificate-transparency-for-phishing
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analyzing-cobalt-strike-beacon-configuration
malware analysis · medium
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soc operations · low
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malware analysis · medium
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incident response · low
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analyzing-threat-landscape-with-misp
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threat intelligence · low
analyzing-windows-event-logs-in-splunk
soc operations · low
auditing-tls-certificate-transparency-logs
threat intelligence · low
automating-ioc-enrichment
threat intelligence · low
building-adversary-infrastructure-tracking-system
threat intelligence · low
building-attack-pattern-library-from-cti-reports
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red teaming · high
building-detection-rule-with-splunk-spl
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building-detection-rules-with-sigma
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building-incident-response-dashboard
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building-incident-timeline-with-timesketch
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building-soc-escalation-matrix
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building-soc-metrics-and-kpi-tracking
soc operations · low
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soc operations · low
building-threat-actor-profile-from-osint
threat intelligence · low
building-threat-feed-aggregation-with-misp
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threat hunting · low
building-threat-intelligence-enrichment-in-splunk
soc operations · low
building-threat-intelligence-feed-integration
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building-threat-intelligence-platform
threat intelligence · low
building-vulnerability-scanning-workflow
soc operations · low
collecting-indicators-of-compromise
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collecting-open-source-intelligence
threat intelligence · low
collecting-threat-intelligence-with-misp
threat intelligence · low
collecting-volatile-evidence-from-compromised-host
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conducting-cloud-incident-response
incident response · low
conducting-domain-persistence-with-dcsync
red teaming · high
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conducting-internal-reconnaissance-with-bloodhound-ce
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conducting-malware-incident-response
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conducting-man-in-the-middle-attack-simulation
network security · medium
conducting-memory-forensics-with-volatility
incident response · low
conducting-pass-the-ticket-attack
red teaming · high
conducting-phishing-incident-response
incident response · low
conducting-post-incident-lessons-learned
incident response · low
conducting-social-engineering-pretext-call
red teaming · high
conducting-spearphishing-simulation-campaign
red teaming · high
configuring-network-segmentation-with-vlans
network security · medium
configuring-pfsense-firewall-rules
network security · medium
configuring-snort-ids-for-intrusion-detection
network security · medium
configuring-suricata-for-network-monitoring
network security · medium
containing-active-breach
incident response · low
correlating-security-events-in-qradar
soc operations · low
correlating-threat-campaigns
threat intelligence · low
deobfuscating-javascript-malware
malware analysis · medium
deobfuscating-powershell-obfuscated-malware
malware analysis · medium
deploying-decoy-files-for-ransomware-detection
ransomware defense · medium
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ransomware defense · medium
detecting-anomalies-in-industrial-control-systems
ot ics security · medium
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detecting-command-and-control-over-dns
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threat hunting · low
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detecting-dnp3-protocol-anomalies
ot ics security · medium
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detecting-exfiltration-over-dns-with-zeek
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threat hunting · low
detecting-kerberoasting-attacks
threat hunting · low
detecting-lateral-movement-in-network
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detecting-lateral-movement-with-splunk
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detecting-lateral-movement-with-zeek
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detecting-mimikatz-execution-patterns
threat hunting · low
detecting-modbus-command-injection-attacks
ot ics security · medium
detecting-modbus-protocol-anomalies
ot ics security · medium
detecting-network-anomalies-with-zeek
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detecting-network-scanning-with-ids-signatures
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detecting-ntlm-relay-with-event-correlation
threat hunting · low
detecting-pass-the-hash-attacks
threat hunting · low
detecting-port-scanning-with-fail2ban
network security · medium
detecting-privilege-escalation-attempts
threat hunting · low
detecting-process-hollowing-technique
threat hunting · low
detecting-process-injection-techniques
malware analysis · medium
detecting-ransomware-encryption-behavior
ransomware defense · medium
detecting-ransomware-precursors-in-network
ransomware defense · medium
detecting-rootkit-activity
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detecting-service-account-abuse
threat hunting · low
detecting-stuxnet-style-attacks
ot ics security · medium
detecting-suspicious-powershell-execution
threat hunting · low
detecting-t1003-credential-dumping-with-edr
threat hunting · low
detecting-t1055-process-injection-with-sysmon
threat hunting · low
detecting-t1548-abuse-elevation-control-mechanism
threat hunting · low
detecting-wmi-persistence
threat hunting · low
eradicating-malware-from-infected-systems
incident response · low
evaluating-threat-intelligence-platforms
threat intelligence · low
executing-red-team-engagement-planning
red teaming · high
exploiting-active-directory-certificate-services-esc1
red teaming · high
exploiting-active-directory-with-bloodhound
red teaming · high
exploiting-bgp-hijacking-vulnerabilities
network security · medium
exploiting-constrained-delegation-abuse
red teaming · high
exploiting-ipv6-vulnerabilities
network security · medium
exploiting-kerberoasting-with-impacket
red teaming · high
exploiting-ms17-010-eternalblue-vulnerability
red teaming · high
exploiting-nopac-cve-2021-42278-42287
red teaming · high
exploiting-smb-vulnerabilities-with-metasploit
network security · medium
exploiting-zerologon-vulnerability-cve-2020-1472
red teaming · high
extracting-config-from-agent-tesla-rat
malware analysis · medium
extracting-iocs-from-malware-samples
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generating-threat-intelligence-reports
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hunting-advanced-persistent-threats
threat intelligence · low
hunting-for-anomalous-powershell-execution
threat hunting · low
hunting-for-beaconing-with-frequency-analysis
threat hunting · low
hunting-for-cobalt-strike-beacons
threat hunting · low
hunting-for-command-and-control-beaconing
threat hunting · low
hunting-for-data-exfiltration-indicators
threat hunting · low
hunting-for-data-staging-before-exfiltration
threat hunting · low
hunting-for-dcom-lateral-movement
threat hunting · low
hunting-for-dcsync-attacks
threat hunting · low
hunting-for-defense-evasion-via-timestomping
threat hunting · low
hunting-for-dns-based-persistence
threat hunting · low
hunting-for-dns-tunneling-with-zeek
threat hunting · low
hunting-for-domain-fronting-c2-traffic
threat hunting · low
hunting-for-lateral-movement-via-wmi
threat hunting · low
hunting-for-living-off-the-cloud-techniques
threat hunting · low
hunting-for-living-off-the-land-binaries
threat hunting · low
hunting-for-lolbins-execution-in-endpoint-logs
threat hunting · low
hunting-for-ntlm-relay-attacks
threat hunting · low
hunting-for-persistence-mechanisms-in-windows
threat hunting · low
hunting-for-persistence-via-wmi-subscriptions
threat hunting · low
hunting-for-process-injection-techniques
threat hunting · low
hunting-for-registry-persistence-mechanisms
threat hunting · low
hunting-for-registry-run-key-persistence
threat hunting · low
hunting-for-scheduled-task-persistence
threat hunting · low
hunting-for-shadow-copy-deletion
threat hunting · low
hunting-for-spearphishing-indicators
threat hunting · low
hunting-for-startup-folder-persistence
threat hunting · low
hunting-for-supply-chain-compromise
threat hunting · low
hunting-for-suspicious-scheduled-tasks
threat hunting · low
hunting-for-t1098-account-manipulation
threat hunting · low
hunting-for-unusual-network-connections
threat hunting · low
hunting-for-unusual-service-installations
threat hunting · low
hunting-for-webshell-activity
threat hunting · low
implementing-alert-fatigue-reduction
soc operations · low
implementing-anti-ransomware-group-policy
ransomware defense · medium
implementing-bgp-security-with-rpki
network security · medium
implementing-browser-isolation-for-zero-trust
network security · medium
implementing-conduit-security-for-ot-remote-access
ot ics security · medium
implementing-ddos-mitigation-with-cloudflare
network security · medium
implementing-diamond-model-analysis
threat intelligence · low
implementing-dragos-platform-for-ot-monitoring
ot ics security · medium
implementing-honeypot-for-ransomware-detection
ransomware defense · medium
implementing-ics-firewall-with-tofino
ot ics security · medium
implementing-iec-62443-security-zones
ot ics security · medium
implementing-immutable-backup-with-restic
ransomware defense · medium
implementing-mitre-attack-coverage-mapping
soc operations · low
implementing-nerc-cip-compliance-controls
ot ics security · medium
implementing-network-access-control
network security · medium
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ot ics security · medium
implementing-network-segmentation-with-firewall-zones
network security · medium
implementing-network-traffic-analysis-with-arkime
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ot ics security · medium
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implementing-security-information-sharing-with-stix2
threat intelligence · low
implementing-siem-use-cases-for-detection
soc operations · low
implementing-soar-automation-with-phantom
soc operations · low
implementing-soar-playbook-with-palo-alto-xsoar
soc operations · low
implementing-stix-taxii-feed-integration
threat intelligence · low
implementing-taxii-server-with-opentaxii
threat intelligence · low
implementing-threat-intelligence-lifecycle-management
threat intelligence · low
implementing-threat-modeling-with-mitre-attack
soc operations · low
implementing-ticketing-system-for-incidents
soc operations · low
implementing-velociraptor-for-ir-collection
incident response · low
investigating-insider-threat-indicators
soc operations · low
investigating-phishing-email-incident
soc operations · low
managing-intelligence-lifecycle
threat intelligence · low
mapping-mitre-attack-techniques
threat intelligence · low
monitoring-darkweb-sources
threat intelligence · low
performing-active-directory-bloodhound-analysis
red teaming · high
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incident response · low
performing-ai-driven-osint-correlation
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performing-alert-triage-with-elastic-siem
soc operations · low
performing-arp-spoofing-attack-simulation
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performing-automated-malware-analysis-with-cape
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performing-bandwidth-throttling-attack-simulation
network security · medium
performing-brand-monitoring-for-impersonation
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performing-cloud-incident-containment-procedures
incident response · low
performing-credential-access-with-lazagne
red teaming · high
performing-dark-web-monitoring-for-threats
threat intelligence · low
performing-deception-technology-deployment
soc operations · low
performing-disk-forensics-investigation
incident response · low
performing-dns-enumeration-and-zone-transfer
network security · medium
performing-dynamic-analysis-with-any-run
malware analysis · medium
performing-false-positive-reduction-in-siem
soc operations · low
performing-firmware-malware-analysis
malware analysis · medium
performing-ics-asset-discovery-with-claroty
ot ics security · medium
performing-indicator-lifecycle-management
threat intelligence · low
performing-initial-access-with-evilginx3
red teaming · high
performing-insider-threat-investigation
incident response · low
performing-ioc-enrichment-automation
soc operations · low
performing-ip-reputation-analysis-with-shodan
threat intelligence · low
performing-kerberoasting-attack
red teaming · high
performing-lateral-movement-detection
soc operations · low
performing-lateral-movement-with-wmiexec
red teaming · high
performing-log-source-onboarding-in-siem
soc operations · low
performing-malware-hash-enrichment-with-virustotal
threat intelligence · low
performing-malware-ioc-extraction
threat intelligence · low
performing-malware-triage-with-yara
malware analysis · medium
performing-memory-forensics-with-volatility3-plugins
malware analysis · medium
performing-network-traffic-analysis-with-tshark
network security · medium
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ot ics security · medium
performing-open-source-intelligence-gathering
red teaming · high
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ot ics security · medium
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ot ics security · medium
performing-ot-vulnerability-scanning-safely
ot ics security · medium
performing-packet-injection-attack
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red teaming · high
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ot ics security · medium
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ot ics security · medium
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performing-purple-team-exercise
soc operations · low
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incident response · low
performing-ransomware-tabletop-exercise
ransomware defense · medium
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ot ics security · medium
performing-scada-hmi-security-assessment
ot ics security · medium
performing-soc-tabletop-exercise
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performing-ssl-stripping-attack
network security · medium
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performing-threat-hunting-with-elastic-siem
soc operations · low
performing-threat-hunting-with-yara-rules
threat hunting · low
performing-threat-intelligence-sharing-with-misp
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performing-threat-landscape-assessment-for-sector
threat intelligence · low
performing-user-behavior-analytics
soc operations · low
performing-vlan-hopping-attack
network security · medium
performing-wifi-password-cracking-with-aircrack
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processing-stix-taxii-feeds
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profiling-threat-actor-groups
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recovering-from-ransomware-attack
ransomware defense · medium
reverse-engineering-android-malware-with-jadx
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reverse-engineering-dotnet-malware-with-dnspy
malware analysis · medium
reverse-engineering-malware-with-ghidra
malware analysis · medium
reverse-engineering-ransomware-encryption-routine
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reverse-engineering-rust-malware
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scanning-network-with-nmap-advanced
network security · medium
securing-historian-server-in-ot-environment
ot ics security · medium
securing-remote-access-to-ot-environment
ot ics security · medium
testing-ransomware-recovery-procedures
incident response · low
tracking-threat-actor-infrastructure
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triaging-security-alerts-in-splunk
soc operations · low
triaging-security-incident
incident response · low
triaging-security-incident-with-ir-playbook
incident response · low
validating-backup-integrity-for-recovery
incident response · low
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