AHB7804R-MH-V2: Improper Access Control
CVE-2024-3765 is a critical-severity improper access control vulnerability in AHB7804R-MH-V2 from Xiongmai, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected AHB7804R-MH-V2 versions: 4.02.R11.24340142.10001.131900.00000; 4.02.R11.A8531149.10001.131900.00000; 4.02.R11.C6380171.11201.141900.00000, and others listed below. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 1.26% chance of exploitation within 30 days, higher than 70% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Check which version of AHB7804R-MH-V2 you run against the affected versions below, and install the vendor's latest release.
- 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 |
|---|---|---|---|
| Xiongmai | AHB7804R-MH-V2 | 4.02.R11.24340142.10001.131900.00000; 4.02.R11.A8531149.10001.131900.00000; 4.02.R11.C6380171.11201.141900.00000; 4.03.R11.0000020X.11201.042300.0000005; 4.03.R11.4912720B.11201.142300.0000004; 4.03.R11.4912720D.11201.142300.0000004; 4.03.R11.4915714A.12201.142300.0000000; 5.00.R02.00030751.10010.348717.0000000 | Not stated |
| Xiongmai | AHB8004T-GL | 4.02.R11.24340142.10001.131900.00000; 4.02.R11.A8531149.10001.131900.00000; 4.02.R11.C6380171.11201.141900.00000; 4.03.R11.0000020X.11201.042300.0000005; 4.03.R11.4912720B.11201.142300.0000004; 4.03.R11.4912720D.11201.142300.0000004; 4.03.R11.4915714A.12201.142300.0000000; 5.00.R02.00030751.10010.348717.0000000 | Not stated |
| Xiongmai | AHB8008T-GL | 4.02.R11.24340142.10001.131900.00000; 4.02.R11.A8531149.10001.131900.00000; 4.02.R11.C6380171.11201.141900.00000; 4.03.R11.0000020X.11201.042300.0000005; 4.03.R11.4912720B.11201.142300.0000004; 4.03.R11.4912720D.11201.142300.0000004; 4.03.R11.4915714A.12201.142300.0000000; 5.00.R02.00030751.10010.348717.0000000 | Not stated |
| Xiongmai | AHB7004T-GS-V3 | 4.02.R11.24340142.10001.131900.00000; 4.02.R11.A8531149.10001.131900.00000; 4.02.R11.C6380171.11201.141900.00000; 4.03.R11.0000020X.11201.042300.0000005; 4.03.R11.4912720B.11201.142300.0000004; 4.03.R11.4912720D.11201.142300.0000004; 4.03.R11.4915714A.12201.142300.0000000; 5.00.R02.00030751.10010.348717.0000000 | Not stated |
| Xiongmai | AHB7004T-MHV2 | 4.02.R11.24340142.10001.131900.00000; 4.02.R11.A8531149.10001.131900.00000; 4.02.R11.C6380171.11201.141900.00000; 4.03.R11.0000020X.11201.042300.0000005; 4.03.R11.4912720B.11201.142300.0000004; 4.03.R11.4912720D.11201.142300.0000004; 4.03.R11.4915714A.12201.142300.0000000; 5.00.R02.00030751.10010.348717.0000000 | Not stated |
| Xiongmai | AHB8032F-LME | 4.02.R11.24340142.10001.131900.00000; 4.02.R11.A8531149.10001.131900.00000; 4.02.R11.C6380171.11201.141900.00000; 4.03.R11.0000020X.11201.042300.0000005; 4.03.R11.4912720B.11201.142300.0000004; 4.03.R11.4912720D.11201.142300.0000004; 4.03.R11.4915714A.12201.142300.0000000; 5.00.R02.00030751.10010.348717.0000000 | Not stated |
| Xiongmai | XM530_R80X30-PQ_8M | 4.02.R11.24340142.10001.131900.00000; 4.02.R11.A8531149.10001.131900.00000; 4.02.R11.C6380171.11201.141900.00000; 4.03.R11.0000020X.11201.042300.0000005; 4.03.R11.4912720B.11201.142300.0000004; 4.03.R11.4912720D.11201.142300.0000004; 4.03.R11.4915714A.12201.142300.0000000; 5.00.R02.00030751.10010.348717.0000000 | Not stated |
| Xiongmaitech | ahb7804r-mh-v2_firmware | 4.02.r11.24340142.10001.131900.00000; 4.02.r11.a8531149.10001.131900.00000; 4.02.r11.c6380171.11201.141900.00000; 4.03.r11.0000020x.11201.042300.0000005; 4.03.r11.4912720b.11201.142300.0000004; 4.03.r11.4912720d.11201.142300.0000004; 4.03.r11.4915714a.12201.142300.0000000; 5.00.r02.00030751.10010.348717.0000000 | Not stated |
| Xiongmaitech | ahb8008t-gl_firmware | 4.03.r11.4915714a.12201.142300.0000000; 4.02.r11.a8531149.10001.131900.00000; 4.03.r11.4912720b.11201.142300.0000004; 4.03.r11.4912720d.11201.142300.0000004; 5.00.r02.00030751.10010.348717.0000000; 4.02.r11.c6380171.11201.141900.00000; 4.03.r11.0000020x.11201.042300.0000005; 4.02.r11.24340142.10001.131900.00000 | Not stated |
| Xiongmaitech | ahb8004t-gl_firmware | 4.03.r11.4915714a.12201.142300.0000000; 4.02.r11.a8531149.10001.131900.00000; 4.03.r11.4912720b.11201.142300.0000004; 4.03.r11.4912720d.11201.142300.0000004; 5.00.r02.00030751.10010.348717.0000000; 4.02.r11.c6380171.11201.141900.00000; 4.03.r11.0000020x.11201.042300.0000005; 4.02.r11.24340142.10001.131900.00000 | Not stated |
| Xiongmaitech | xm530_r80x30-pq_8m_firmware | 4.03.r11.4915714a.12201.142300.0000000; 4.02.r11.a8531149.10001.131900.00000; 4.03.r11.4912720b.11201.142300.0000004; 4.03.r11.4912720d.11201.142300.0000004; 5.00.r02.00030751.10010.348717.0000000; 4.02.r11.c6380171.11201.141900.00000; 4.03.r11.0000020x.11201.042300.0000005; 4.02.r11.24340142.10001.131900.00000 | Not stated |
| Xiongmaitech | ahb7004t-gs-v3_firmware | 4.03.r11.4915714a.12201.142300.0000000; 4.02.r11.a8531149.10001.131900.00000; 4.03.r11.4912720b.11201.142300.0000004; 4.03.r11.4912720d.11201.142300.0000004; 5.00.r02.00030751.10010.348717.0000000; 4.02.r11.c6380171.11201.141900.00000; 4.03.r11.0000020x.11201.042300.0000005; 4.02.r11.24340142.10001.131900.00000 | Not stated |
| Xiongmaitech | ahb8032f-lme_firmware | 4.03.r11.4915714a.12201.142300.0000000; 4.02.r11.a8531149.10001.131900.00000; 4.03.r11.4912720b.11201.142300.0000004; 4.03.r11.4912720d.11201.142300.0000004; 5.00.r02.00030751.10010.348717.0000000; 4.02.r11.c6380171.11201.141900.00000; 4.03.r11.0000020x.11201.042300.0000005; 4.02.r11.24340142.10001.131900.00000 | Not stated |
| Xiongmaitech | ahb7004t-mhv2_firmware | 4.03.r11.4915714a.12201.142300.0000000; 4.02.r11.a8531149.10001.131900.00000; 4.03.r11.4912720b.11201.142300.0000004; 4.03.r11.4912720d.11201.142300.0000004; 5.00.r02.00030751.10010.348717.0000000; 4.02.r11.c6380171.11201.141900.00000; 4.03.r11.0000020x.11201.042300.0000005; 4.02.r11.24340142.10001.131900.00000 | 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
- 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
- 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:N/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (vuldb.com).
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 9.8 | Critical | CNA (vuldb.com) |
| CVSS 2.0 | 10.0 | High | CNA (vuldb.com) |
Official description
A vulnerability classified as critical was found in Xiongmai AHB7804R-MH-V2, AHB8004T-GL, AHB8008T-GL, AHB7004T-GS-V3, AHB7004T-MHV2, AHB8032F-LME and XM530_R80X30-PQ_8M. Affected by this vulnerability is an unknown functionality of the component Sofia Service. The manipulation with the input ff00000000000000000000000000f103250000007b202252657422203a203130302c202253657373696f6e494422203a202230783022207d0a leads to improper access controls. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-260605 was assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Access Control
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
How developers prevent this class of flaw
- Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
- Compartmentalize the system to have safe areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area. Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: yes, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other references
Recent Improper Access Control vulnerabilities
- 8.8 High severity
- 7.5 High severity
- 7.5 High severity
- 9.1 Critical severity
- 7.2 High severity
- 8.2 High severity
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