WBR-6013: Improper Verification of Cryptographic Signature
CVE-2023-34435 is a high-severity improper verification of cryptographic signature vulnerability in WBR-6013 from LevelOne, with a CVSS 3.1 base score of 7.2 out of 10. It can be exploited remotely over the network by an attacker with administrator privileges, without any action from a user. Affected WBR-6013 versions: RER4_A_v3411b_2T2R_LEV_09_170623. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.47% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of WBR-6013 you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| LevelOne | WBR-6013 | RER4_A_v3411b_2T2R_LEV_09_170623 | Not stated |
| Realtek | rtl819x Jungle SDK | v3.4.11 | Not stated |
| Realtek | rtl819x_software_development_kit | 3.4.11 | Not stated |
| Level One | wbr6013 | rer4_a_v3411b_2t2r_lev_09_170623 | Not stated |
| Realtek | Rtl819x Jungle Software Development Kit | 3.4.11 | Not stated |
| Level1 | Wbr-6013 Firmware | rer4_a_v3411b_2t2r_lev_09_170623 | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- HighAdministrator-level access is required first.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.2 | High | CNA (cisco.com) |
| CVSS 3.1 | 7.2 | High | NVD |
Official description
A firmware update vulnerability exists in the boa formUpload functionality of Realtek rtl819x Jungle SDK v3.4.11. A specially crafted network packets can lead to arbitrary firmware update. An attacker can provide a malicious file to trigger this vulnerability.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Verification of Cryptographic Signature
The product does not verify, or incorrectly verifies, the cryptographic signature for data.
More Improper Verification of Cryptographic Signature vulnerabilities (CWE-347)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- talosintelligence.com/vulnerability_reports/TALOS-2023-1874Third Party Advisory
Other references
Other vulnerabilities in WBR-6013
- 7.2 High severity
- 7.2 High severity
- 7.2 High severity
- 7.2 High severity
- 7.2 High severity
- 7.2 High severity
Recent Improper Verification of Cryptographic Signature vulnerabilities
- 7.8 High severity
- 8.8 High severity
- 7.5 High severity
- 7.8 High severity
- 7.8 High severity
- 10.0 Critical severity
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