WBR-6013: Integer Overflow or Wraparound
CVE-2023-45742 is a high-severity integer overflow or wraparound 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 1.18% chance of exploitation within 30 days, higher than 68% of scored 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
An integer overflow vulnerability exists in the boa updateConfigIntoFlash functionality of Realtek rtl819x Jungle SDK v3.4.11. A specially crafted series of HTTP requests can lead to arbitrary code execution. An attacker can send a sequence of requests to trigger this vulnerability.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Integer Overflow or Wraparound
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
How developers prevent this class of flaw
- Ensure that all protocols are strictly defined, such that all out-of-bounds behavior can be identified simply, and require strict conformance to the protocol.
- Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. If possible, choose a language or compiler that performs automatic bounds checking.
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. Use libraries or frameworks that make it easier to handle numbers without unexpected consequences. Examples include safe integer handling packages such as SafeInt (C++) or IntegerLib (C or C++).
More Integer Overflow or Wraparound vulnerabilities (CWE-190)
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
Technical write-ups (may include proof of concept)
- talosintelligence.com/vulnerability_reports/TALOS-2023-1877Exploit, Third 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 Integer Overflow or Wraparound vulnerabilities
- 9.8 Critical severity
- 9.8 Critical severity
- 7.8 High severity
- 8.8 High severity
- 9.8 Critical severity
- 9.1 Critical severity
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