GG18/GG20 ECDSA Private Key injection

CVSS Meta Temp Score
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CTI Interest Score
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7.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in GG18 and GG20. This affects an unknown part of the component ECDSA Private Key Handler. The manipulation results in injection. This vulnerability is known as CVE-2023-33241. It is possible to launch the attack remotely. Furthermore, an exploit is available.

Detailsinfo

A vulnerability classified as problematic has been found in GG18 and GG20 (affected version not known). Affected is some unknown functionality of the component ECDSA Private Key Handler. The manipulation with an unknown input leads to a injection vulnerability. CWE is classifying the issue as CWE-74. 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. This is going to have an impact on confidentiality. CVE summarizes:

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.

The weakness was published 08/10/2023. The advisory is shared for download at fireblocks.com. This vulnerability is traded as CVE-2023-33241 since 05/19/2023. Technical details are unknown but a public exploit is available. The MITRE ATT&CK project declares the attack technique as T1055.

The exploit is shared for download at github.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.5

VulDB Base Score: 4.3
VulDB Temp Score: 3.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.1
NVD Vector: 🔍

CNA Base Score: 9.6
CNA Vector (Halborn): 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Injection
CWE: CWE-74 / CWE-707 / CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/19/2023 🔍
08/10/2023 +83 days 🔍
08/10/2023 +0 days 🔍
09/02/2023 +23 days 🔍

Sourcesinfo

Advisory: fireblocks.com
Status: Not defined

CVE: CVE-2023-33241 (🔍)
GCVE (CVE): GCVE-0-2023-33241
GCVE (VulDB): GCVE-100-236700
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/10/2023 08:46
Updated: 09/02/2023 20:25
Changes: 08/10/2023 08:46 (47), 09/02/2023 20:25 (12)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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