Medium, CVSS 6.5npmAmendedPublished
Utils.readChallengeTx does not verify the server account signature
CVE-2021-32738 · GHSA-6cgh-hjpw-q3gq
- Affected
- npm stellar-sdk < 8.2.3
- Fixed in
- 8.2.3· Vendor fix available
- Issue
- The Utils.readChallengeTx function used in SEP-10 Stellar Web Authentication states in its function documentation that it reads and validates the challenge transaction including verifying that the serverAccountID has signed the transaction. The function does not verify that the server has signed the transaction and has been fixed so that it does in v8.2.3. Applications that also used Utils.verifyChallengeTxThreshold or Utils.verifyChallengeTxSigners to verify the signatures including the server signature on the challenge transaction are unaffected as those functions verify the server signed the transaction. Applications calling Utils.readChallengeTx should update to v8.2.3 to ensure that the challenge transaction is completely valid and signed by the server creating the challenge transaction.
Recommended action: Upgrade to 8.2.3 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.