CVE-2018-6892
CRITICALCVE-2018-6892 is a critical-severity (CVSS 9.8) Buffer Overflow vulnerability in cloudme sync. 12 public exploit references exist, so weaponization risk is real. O3 Security detects and blocks CVE-2018-6892 exploitation at runtime via eBPF exploit-chain detection and L7 egress monitoring, even on unpatched systems.
An issue was discovered in CloudMe before 1.11.0. An unauthenticated remote attacker that can connect to the "CloudMe Sync" client application listening on port 8888 can send a malicious…
Description
An issue was discovered in CloudMe before 1.11.0. An unauthenticated remote attacker that can connect to the "CloudMe Sync" client application listening on port 8888 can send a malicious payload causing a buffer overflow condition. This will result in an attacker controlling the program's execution flow and allowing arbitrary code execution.
Affected Products
synccloudmeResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
CloudMe Sync 1.10.9 - Stack-Based Buffer Overflow (Metasploit)
by Metasploit · Feb 26, 2018
CloudMe 1.11.2 - Buffer Overflow ROP (DEP_ASLR)
by boku · Sep 29, 2020
CloudMe Sync < 1.11.0 - Buffer Overflow
by hyp3rlinx · Feb 13, 2018
CloudMe Sync 1.11.2 Buffer Overflow - WoW64 (DEP Bypass)
by Matteo Malvica · Jan 28, 2019
Cloudme 1.9 - Buffer Overflow (DEP) (Metasploit)
by Raymond Wellnitz · Aug 14, 2018
Detection & mitigation playbook
Vendor / applianceDetect
Inventory every cloudme sync deployment and check each version against the affected-products list above. Because the exploit targets the running system rather than your application code, also watch for remote code execution at the network and runtime layer — O3 flags the exploit behaviour from runtime telemetry and egress traffic even before a vulnerable build is confirmed.
Remediation status
No patch has shipped for CVE-2018-6892 yet — track the cloudme sync advisory for a fixed release and apply the workarounds below in the meantime.
Mitigate without a patch
Cut exposure now: restrict the management/admin interface to trusted networks, segment the device, and apply the vendor's recommended configuration mitigations and any WAF/IPS signature. O3's runtime protection blocks the exploit chain at execution, holding the line on unpatched or end-of-life systems until you can patch.
How O3 protects you
O3 detects and blocks CVE-2018-6892 exploitation at runtime: eBPF exploit-chain detection, plus L7 egress monitoring that catches the post-exploitation callback and severs the attacker's outbound channel.
Tailored to CVE-2018-6892. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2018-6892 being exploited in your environment?
O3's eBPF runtime sensors and L7 egress monitoring detect and block the CVE-2018-6892 exploit chain at execution — protecting unpatched and end-of-life systems until the vendor patch is applied.