ANC: Modification of Assumed-Immutable Data (MAID)
CVE-2024-9876 is a high-severity modification of assumed-immutable data (MAID) vulnerability in ANC from ABB, with a CVSS 3.1 base score of 7.3 out of 10. It can be exploited from the same local network by an attacker with a low-privileged account, without any action from a user. Affected ANC versions: 1.1.4 and earlier. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.25% 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 ANC you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| ABB | ANC | 1.1.4 and earlier | Not stated |
| ABB | ANC-L | 1.1.4 and earlier | Not stated |
| ABB | ANC-mini | 1.1.4 and earlier | 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
- AdjacentThe attacker must be on the same local network segment.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- 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
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N. Scored by CNA (ch.abb.com).
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 8.5 | High | CNA (ch.abb.com) |
| CVSS 3.1 | 7.3 | High | CNA (ch.abb.com) |
Official description
: Modification of Assumed-Immutable Data (MAID) vulnerability in ABB ANC, ABB ANC-L, ABB ANC-mini.This issue affects ANC: through 1.1.4; ANC-L: through 1.1.4; ANC-mini: through 1.1.4.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Modification of Assumed-Immutable Data (MAID)
The product does not properly protect an assumed-immutable element from being modified by an attacker.
How developers prevent this class of flaw
- When the data is stored or transmitted through untrusted sources that could modify the data, implement integrity checks to detect unauthorized modification, or store/transmit the data in a trusted location that is free from external influence.
More Modification of Assumed-Immutable Data (MAID) vulnerabilities (CWE-471)
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
Other references
Recent Modification of Assumed-Immutable Data (MAID) vulnerabilities
- 8.3 High severity
- 7.3 High severity
- 9.8 Critical severity
- 8.4 High severity
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