CVE-2025-64721
Last modified
CVE-2025-64721 is a critical-severity vulnerability rated 9.9/10 on the CVSS scale. Sandboxie is a sandbox-based isolation software for 32-bit and 64-bit Windows NT-based operating systems. In versions 1.16.6 and below, the SYSTEM-level service SbieSvc.exe exposes SbieIniServer::RC4Crypt to sandboxed processes. EPSS estimates a 0.60% chance of exploitation in the next 30 days.
Description
Sandboxie is a sandbox-based isolation software for 32-bit and 64-bit Windows NT-based operating systems. In versions 1.16.6 and below, the SYSTEM-level service SbieSvc.exe exposes SbieIniServer::RC4Crypt to sandboxed processes. The handler adds a fixed header size to a caller-controlled value_len without overflow checking. A large value_len (e.g., 0xFFFFFFF0) wraps the allocation size, causing a heap overflow when attacker data is copied into the undersized buffer. This allows sandboxed processes to execute arbitrary code as SYSTEM, fully compromising the host. This issue is fixed in version 1.16.7.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/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
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Sandboxie-Plus | Sandboxie | >= 1.14.0, < 1.16.7 |
References
- https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-w476-j57g-96vpExploit, Vendor Advisory
- https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-w476-j57g-96vpExploit, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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