CVE-2023-42446
Pow Mnesia cache doesn't invalidate all expired keys on startup
Impact
Use of `Pow.Store.Backend.MnesiaCache` is susceptible to session hijacking as expired keys are not being invalidated correctly on startup. A cache key may become expired when all `Pow.Store.Backend.MnesiaCache` instances have been shut down for a period that is longer than the keys' remaining TTL and the expired key won't be invalidated on startups. ### Workarounds The expired keys, including all expired sessions, can be manually invalidated by running: ```elixir :mnesia.sync_transaction(fn -> Enum.each(:mnesia.dirty_select(Pow.Store.Backend.MnesiaCache, [{{Pow.Store.Backend.MnesiaCache, :_, :_}, [], [:"$_"]}]), fn {_, key, {_value, expire}} -> ttl = expire - :os.system_time(:millisecond) if ttl < 0, do: :mnesia.delete({Pow.Store.Backend.MnesiaCache, key}) end) end) ``` ### References https://github.com/pow-auth/pow/commit/15dc525be03c466daa5d2119ca7acdec7b24ed17 https://github.com/pow-auth/pow/issues/713 https://github.com/pow-auth/pow/pull/714
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| erlang | pow | >= 1.0.14, < 1.0.34 | 1.0.34 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Powauth | Pow | from 1.0.14 before 1.0.34 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/pow-auth/pow/issues/713
- https://github.com/pow-auth/pow/security/advisories/GHSA-3cjh-p6pw-jhv9
- https://github.com/advisories/GHSA-3cjh-p6pw-jhv9
- https://nvd.nist.gov/vuln/detail/CVE-2023-42446
- https://github.com/pow-auth/pow/pull/714
- https://github.com/pow-auth/pow/commit/15dc525be03c466daa5d2119ca7acdec7b24ed17