Chall-Manager's scenario decoding process does not check for zip bombs
### Impact When decoding a scenario (i.e. a zip archive), the size of the decoded content is not checked, potentially leading to zip bombs decompression. Exploitation does not require authentication nor authorization, so anyone can exploit it. It should nonetheless not be exploitable as it is highly recommended to bury Chall-Manager deep within the infrastructure due to its large capabilities, so no users could reach the system. ### Patches Patch has been implemented by [commit `14042aa`](https://github.com/ctfer-io/chall-manager/commit/14042aa66a577caee777e10fe09adcf2587d20dd) and shipped in [`v0.1.4`](https://github.com/ctfer-io/chall-manager/releases/tag/v0.1.4). ### Workarounds No workaround exist. ### References N/A.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2025-53633US | critical9.8 | — | ||
Chall-Manager is a platform-agnostic system able to start Challenges on Demand of a player. When decoding a scenario (i.e. a zip archive), the size of the decoded content is not ch… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/ctfer-io/chall-managerPACKAGE
- https://github.com/ctfer-io/chall-manager/commit/14042aa66a577caee777e10fe09adcf2587d20ddWEB
- https://github.com/ctfer-io/chall-manager/releases/tag/v0.1.4WEB
- https://github.com/ctfer-io/chall-manager/security/advisories/GHSA-r7fm-3pqm-ww5wWEB
- https://nvd.nist.gov/vuln/detail/CVE-2025-53633ADVISORY
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