Forge: Ed25519 signature verification accepts small-order public keys
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| digitalbazaar | forge | affected |
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| Digitalbazaar | Forge |
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Github GHSA |
GHSA-6889-vf6x-f3g5 | Forge: Ed25519 signature verification accepts small-order public keys |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.203% probability within 30 days)
Key SSVC decision points have not yet been added.
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Digitalbazaar
Digitalbazaar forge |
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Digitalbazaar
Digitalbazaar forge |
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threat_severity
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threat_severity
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| Description | Forge (also called node-forge) is a native implementation of Transport Layer Security in JavaScript. Prior to 1.4.3, ed25519.verify() decodes a public key in crypto_sign_open() without rejecting small-order points or their non-canonical encodings. With S = 0 and a small-order R value, an attacker who can choose the public key can produce signatures that verify for many messages, or all messages with the identity key, without a private key. This can defeat proof-of-possession, attribution, non-repudiation, or deduplication checks that rely on a signature being bound to the message. Keys produced by normal Ed25519 key generation are not small-order, so applications that verify only trusted or internally generated public keys are not affected. This issue is fixed in version 1.4.3. | |
| Title | Forge: Ed25519 signature verification accepts small-order public keys | |
| Weaknesses | CWE-347 | |
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| Metrics |
cvssV3_1
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