Security readout for executives and security teams
Plain-English summary
This issue affects Ledger Live environments that used vulnerable ledgerhq/hw-app-eth versions before 6.34.7 for Ethereum EIP-712 typed-data signing. Malformed odd-length hexadecimal values could be parsed incorrectly, so a user might approve one displayed meaning while the signed data authorizes a different blockchain transaction, including incorrect transfer amounts.
Executive priority
Treat as a moderate integrity risk for cryptocurrency signing operations. Prioritize updates where Ledger Live is used for Ethereum typed-data approvals, especially in treasury, custody, or high-value transaction workflows.
Technical view
The vulnerability is an integer parsing/type conversion issue (CWE-704) in EIP-712 message parsing. When hexadecimal fields have an odd number of characters, hw-app-eth can truncate or misinterpret values before signing. CVSS 4.0 is 6.9 with network reachability, low complexity, no privileges, required user interaction, and high integrity impact.
Likely exposure
Exposure is most likely where Ledger Live or integrations depended on ledgerhq/hw-app-eth before 6.34.7 and processed EIP-712 typed-data signing requests. The source bundle does not identify broader Ledger products or hosted services as affected.
Exploitation context
The sources describe a user-assisted signing risk, not confirmed active exploitation. CVE data marks the issue as not in KEV. An attacker would need to get a victim to sign crafted EIP-712 data that is parsed differently than intended.
Researcher notes
Evidence supports incorrect hexadecimal field parsing with odd-length values leading to truncated or misinterpreted EIP-712 message values. Public sources provided do not establish exploitation in the wild, affected CPEs, or mitigations beyond upgrading and following Ledger guidance.
Mitigation direction
- Update ledgerhq/hw-app-eth to version 6.34.7 or later.
- Check Ledger Security Bulletin 020 for vendor-specific guidance.
- Ensure Ledger Live components using hw-app-eth are current.
- Warn users to scrutinize EIP-712 signing prompts and transaction amounts.
- Review high-value signing workflows for typed-data dependency.
Validation and detection
- Inventory Ledger Live and hw-app-eth versions in use.
- Confirm no deployed component uses hw-app-eth before 6.34.7.
- Review recent EIP-712 signing activity for unexpected asset transfers.
- Validate wallet approval workflows display values consistently.
- Track Ledger advisory updates for any revised affected-version details.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-704: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2023-7345 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.9 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
2 official scoresWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N——VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N2.83.6VulnCheckVulnerability scoring details
Base CVSS 4.0 score
6.9MediumVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- Ledger Security Bulletin 020CVE reference, VulnCheck · vendor-advisory
- https://www.vulncheck.com/advisories/ledger-live-hw-app-eth-eip-712-message-parsing-integer-truncationCVE reference, VulnCheck · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Incorrect Type Conversion or Cast
Incorrect Type Conversion or Cast represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.