CVE-2020-12118Network attack vector

Signing compromise via unproven keygen parameters

Published Apr 23, 2020 · Updated Aug 4, 2024

Cryptographic parameter validation in Binance tss-lib before 1.2.0 allows attackers to compromise signing rounds or read sensitive data. The ECDSA key-generation round accepted participant-supplied h1 and h2 values without proof that they generated the same group modulo N. Attackers must participate in distributed key generation and submit crafted parameters; the bounded effects are signing-round compromise or disclosure from peers.

CVSS severity8.2
High
EPSS probability1.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cryptographic parameter validation in Binance tss-lib before 1.2.0 allows attackers to compromise signing rounds or read sensitive data. The ECDSA key-generation round accepted participant-supplied h1 and h2 values without proof that they generated the same group modulo N. Attackers must participate in distributed key generation and submit crafted parameters; the bounded effects are signing-round compromise or disclosure from peers.

The record

CVE
CVE-2020-12118
Published
Apr 23, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-276
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 23, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.4NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:N
8.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
7.2GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:R

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-276Incorrect Default Permissions

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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