Sandbox escape for instances that have enabled transformation functions in matrix-hookshot
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
matrix-hookshot is a Matrix bot for connecting to external services like GitHub, GitLab, JIRA, and more. Instances that have enabled transformation functions (those that have `generic.allowJsTransformationFunctions` in their config), may be vulnerable to an attack where it is possible to break out of the `vm2` sandbox and as a result Hookshot will be vulnerable to this. This problem is only likely to affect users who have allowed untrusted users to apply their own transformation functions. If you have only enabled a limited set of trusted users, this threat is reduced (though not eliminated). Version 4.5.0 and above of hookshot include a new sandbox library which should better protect users. Users are advised to upgrade. Users unable to upgrade should disable `generic.allowJsTransformationFunctions` in the config.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| matrix-org | matrix-hookshot | before 4.5.0 | 4.5.0 | Patch available | CNA |
- matrix-hookshot Vendormatrix-org Affected before 4.5.0 Fixed in 4.5.0 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:matrix:hookshot:*:*:*:*:*:*:*:* | before 4.5.0 | Vulnerable | matrix-org |
- cpe:2.3:a:matrix:hookshot:*:*:*:*:*:*:*:* Versions before 4.5.0 Vulnerable ·matrix-org
Remediation
- Fix · CNA matrix-hookshot (matrix-org) Fixed in 4.5.0
Timeline
- 2026-10-02 Threatist record created from CVE-2023-43656
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences