Vulnerability Details : CVE-2023-33242
Crypto wallets implementing the Lindell17 TSS protocol might allow an attacker to extract the full ECDSA private key by exfiltrating a single bit in every signature attempt (256 in total) because of not adhering to the paper's security proof's assumption regarding handling aborts after a failed signature.
Products affected by CVE-2023-33242
- cpe:2.3:a:lindell17_project:lindell17:-:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-33242
0.13%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 49 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-33242
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
9.6
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N |
3.1
|
5.8
|
Halborn | |
|
8.1
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
2.8
|
5.2
|
NIST |
CWE ids for CVE-2023-33242
-
The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.Assigned by: nvd@nist.gov (Primary)
References for CVE-2023-33242
-
https://www.fireblocks.com/blog/lindell17-abort-vulnerability-technical-report/
Lindell17 Abort Vulnerability [CVE-2023-33242]: Technical Report - FireblocksThird Party Advisory
-
https://eprint.iacr.org/2017/552.pdf
Exploit;Third Party Advisory
-
https://github.com/fireblocks-labs/mpc-ecdsa-attacks-23
GitHub - fireblocks-labs/mpc-ecdsa-attacks-23Exploit
-
https://github.com/fireblocks-labs/zengo-lindell17-exploit-poc
GitHub - fireblocks-labs/zengo-lindell17-exploit-pocExploit
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