CVE-2023-43656
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.28%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 9.0 CRITICALCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 0.28% probability · 21th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-74
- Affected
- matrix/hookshot
- Source
- security-advisories@github.com
References
- https://github.com/matrix-org/matrix-hookshot/commit/dc126afa6af86d66aefcd23a825326f405bcc894Patch
- https://github.com/matrix-org/matrix-hookshot/security/advisories/GHSA-fr97-pv6w-4cj6Vendor Advisory
- https://github.com/matrix-org/matrix-hookshot/commit/dc126afa6af86d66aefcd23a825326f405bcc894Patch
- https://github.com/matrix-org/matrix-hookshot/security/advisories/GHSA-fr97-pv6w-4cj6Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.