BS-GSL and BS-GS series: Exposure of Resource to Wrong Sphere
CVE-2023-26588 is a high-severity exposure of resource to wrong sphere vulnerability in BS-GSL and BS-GS series from Buffalo, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. There is no confirmed exploitation so far. EPSS estimates a 0.57% 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
- Update Bs-gs2016p Firmware to 1.1.7.01 or a later version.
- Update Bs-gs2024p Firmware to 1.1.7.01 or a later version.
- Update Bs-gsl2005 Firmware to 1.12-0.01 or a later version.
- Read the advisory on buffalo.jp for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| BUFFALO | BS-GSL and BS-GS series | Not specified in the record | Not stated |
| Buffalo | Bs-gsl2024 Firmware | 1.10-0.03 and earlier | Not stated |
| Buffalo | Bs-gsl2016p Firmware | 1.10-0.03 and earlier | Not stated |
| Buffalo | Bs-gsl2016 Firmware | 1.10-0.03 and earlier | Not stated |
| Buffalo | Bs-gs2008 Firmware | 1.0.10.01 and earlier | Not stated |
| Buffalo | Bs-gs2016 Firmware | 1.0.10.01 and earlier | Not stated |
| Buffalo | Bs-gs2024 Firmware | 1.0.10.01 and earlier | Not stated |
| Buffalo | Bs-gs2048 Firmware | 1.0.10.01 and earlier | Not stated |
| Buffalo | Bs-gs2008p Firmware | 1.0.10.01 and earlier | Not stated |
| Buffalo | Bs-gs2016p Firmware | 1.0.10.01 and earlier; before 1.1.7.01 | 1.1.7.01 |
| Buffalo | Bs-gs2024p Firmware | 1.0.10.01 and earlier; before 1.1.7.01 | 1.1.7.01 |
| Buffalo | Bs-gsl2005 Firmware | before 1.12-0.01 | 1.12-0.01 |
| Buffalo | Bs-gsl2008 Firmware | before 1.12-0.01 | 1.12-0.01 |
| Buffalo | Bs-gsl2005p Firmware | before 1.11-0.01 | 1.11-0.01 |
| Buffalo | Bs-gsl2008p Firmware | before 1.11-0.01 | 1.11-0.01 |
| Buffalo | Bs-gs2016hp Firmware | before 1.1.7.01 | 1.1.7.01 |
| Buffalo | Bs-gs2024hp Firmware | before 1.1.7.01 | 1.1.7.01 |
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
- NoneNo account or login is needed.
- 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
- NoneNothing can be modified.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.5 | High | NVD |
| CVSS 3.1 | 7.5 | High | CISA (ADP) |
Official description
Use of hard-coded credentials vulnerability in Buffalo network devices allows an attacker to access the debug function of the product. The affected products and versions are as follows: BS-GSL2024 firmware Ver. 1.10-0.03 and earlier, BS-GSL2016P firmware Ver. 1.10-0.03 and earlier, BS-GSL2016 firmware Ver. 1.10-0.03 and earlier, BS-GS2008 firmware Ver. 1.0.10.01 and earlier, BS-GS2016 firmware Ver. 1.0.10.01 and earlier, BS-GS2024 firmware Ver. 1.0.10.01 and earlier, BS-GS2048 firmware Ver. 1.0.10.01 and earlier, BS-GS2008P firmware Ver. 1.0.10.01 and earlier, BS-GS2016P firmware Ver. 1.0.10.01 and earlier, and BS-GS2024P firmware Ver. 1.0.10.01 and earlier
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Exposure of Resource to Wrong Sphere
The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource.
More Exposure of Resource to Wrong Sphere vulnerabilities (CWE-668)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Advisories
Patches and release notes
- jvn.jp/en/vu/JVNVU96824262/Third Party Advisory
Other vulnerabilities in BS-GSL and BS-GS series
- 8.1 High severity
Recent Exposure of Resource to Wrong Sphere vulnerabilities
- 8.7 High severity
- 8.8 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
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