Infinite recursion (CPU denial-of-service) in JOSE.JWK.shared_secret/2 on mismatched key types
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| potatosalad | jose | unaffected |
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| potatosalad | jose | unaffected |
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| Potatosalad | Jose |
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| Potatosalad | Jose |
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Vendor Workaround
Before calling JOSE.JWK.shared_secret/2, verify that the externally supplied peer key's type (kty) and curve match your own key, and reject any key whose type does not match before attempting derivation.
No CVSS v3.1
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.136% probability within 30 days)
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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| Description | jose_jwk:shared_secret/2 (exposed in Elixir as JOSE.JWK.shared_secret/2) derives an ECDH shared secret from two JWKs. Its first function clause only matches when both JWKs carry the same key type (kty) module, and its fallback clause re-invokes itself as shared_secret(from(YourJWK), from(MyJWK)). Because from/1 returns an already-parsed jose_jwk record unchanged, passing two JWKs whose key types differ (for example an EC key and an RSA key) makes the fallback clause re-enter with identical arguments, producing an unbounded tail-recursive loop that never returns and never crashes. An application that derives a shared secret from an externally supplied peer public key without first checking that the peer key's type and curve match its own key can be driven into this loop by an attacker-controlled JWK, pinning an Erlang scheduler at 100% CPU. Repeated requests exhaust the available schedulers, resulting in a denial of service. This issue affects jose: from 1.5.0 before 1.11.13. | |
| Title | Infinite recursion (CPU denial-of-service) in JOSE.JWK.shared_secret/2 on mismatched key types | |
| First Time appeared |
Potatosalad
Potatosalad jose |
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| Weaknesses | CWE-674 | |
| CPEs | cpe:2.3:a:potatosalad:jose:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Potatosalad
Potatosalad jose |
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| References |
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| Metrics |
cvssV4_0
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