CVE-2023-33241 — Crypto wallets implementing the GG18 or GG20 TSS protocol might allow an attacke
Crypto wallets implementing the GG18 or GG20 TSS protocol might allow an attacker to extract a full ECDSA private key by injecting a malicious pallier key and cheating in the range proof. Depending on the Beta parameters chosen in the protocol implementation, the attack might req
Published
2023-08-09T21:00:20.582Z
Last modified
2024-10-10T14:37:44.417Z
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
01What is this vulnerability?
Crypto wallets implementing the GG18 or GG20 TSS protocol might allow an attacker to extract a full ECDSA private key by injecting a malicious pallier key and cheating in the range proof. Depending on the Beta parameters chosen in the protocol implementation, the attack might require 16 signatures or more fully exfiltrate the other parties' private key shares.
02Affected products
| Vendor | Product | Versions |
|---|
| GG TSS Implementations | Wallet | 18, 20 |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2023-08-09T21:00:20.582Z
- Last modified: 2024-10-10T14:37:44.417Z
09References
- www.fireblocks.com — https://www.fireblocks.com/blog/gg18-and-gg20-paillier-key-vulnerability-technic…
- github.com — https://github.com/fireblocks-labs/mpc-ecdsa-attacks-23
- github.com — https://github.com/fireblocks-labs/safeheron-gg20-exploit-poc
- eprint.iacr.org — https://eprint.iacr.org/2019/114.pdf
- eprint.iacr.org — https://eprint.iacr.org/2020/540.pdf
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