B&R APROL: Incomplete Filtering of Special Elements
CVE-2024-45481 is a high-severity incomplete filtering of special elements vulnerability in B&R APROL from B&R Industrial Automation, with a CVSS 4.0 base score of 8.5 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. The record lists version 4.4-00P5 as the first without the flaw, so updating B&R APROL to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.15% 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 B&R APROL to 4.4-00P5 or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| B&R Industrial Automation | B&R APROL | R4.4 up to, but not including, 4.4-00P5 | 4.4-00P5 |
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
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Attack requirements
- NoneThe attack does not depend on a particular deployment or configuration.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Confidentiality (vulnerable system)
- HighSerious loss of confidentiality on the vulnerable system.
- Integrity (vulnerable system)
- HighSerious loss of integrity on the vulnerable system.
- Availability (vulnerable system)
- HighSerious loss of availability on the vulnerable system.
- Confidentiality (other systems)
- NoneNo loss of confidentiality on systems beyond the vulnerable one.
- Integrity (other systems)
- NoneNo loss of integrity on systems beyond the vulnerable one.
- Availability (other systems)
- NoneNo loss of availability on systems beyond the vulnerable one.
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. Scored by CNA (ch.abb.com).
Official description
An Incomplete Filtering of Special Elements vulnerability in scripts using the SSH server on B&R APROL <4.4-00P5 may allow an authenticated local attacker to authenticate as another legitimate user.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Incomplete Filtering of Special Elements
The product receives data from an upstream component, but it does not completely filter special elements before sending it to a downstream component.
More Incomplete Filtering of Special Elements vulnerabilities (CWE-791)
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
Other vulnerabilities in B&R APROL
- 8.5 High severity
- 9.2 Critical severity
- 7.8 High severity
- 7.8 High severity
- 7.5 High severity
- 9.8 Critical severity
Recent Incomplete Filtering of Special Elements vulnerabilities
- 8.8 High severity
- 7.8 High severity
- 7.4 High severity
- 8.6 High severity
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