Description
filebrowser through 2.63.23 fails to limit WebSocket message size in the /api/command handler before checking permissions, allowing authenticated users to buffer arbitrarily large messages. Attackers can send oversized WebSocket messages to exhaust server heap memory and cause denial of service regardless of EnableExec setting or Execute permission.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| filebrowser | filebrowser | ≤ 2.63.23 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | filebrowser +1 | No fix yet | — |
References
- GitHub Security Advisory (GHSA-39cx-23x9-5c8p) vendor-advisory
- VulnCheck Advisory: filebrowser through 2.63.23 Denial of Service via unbounded WebSocket message third-party-advisory