ABB is aware of vulnerabilities in the product versions listed below. An update is available that resolves the reported vulnerabilities in the product versions under maintenance. An attacker who successfully exploited one or more of these vulnerabilities could cause the product to stop or make the product inaccessible.
Numeric Range Comparison Without Minimum Check vulnerability in ABB Freelance controllers AC 700F (Controller modules), ABB Freelance controllers AC 900F (controller modules).This issue affects:
Freelance controllers AC 700F:
from 9.0;0 through V9.2 SP2, through Freelance 2013, through Freelance 2013SP1, through Freelance 2016, through Freelance 2016SP1, through Freelance 2019, through Freelance 2019 SP1, through Freelance 2019 SP1 FP1;
Freelance controllers AC 900F:
Freelance 2013, through Freelance 2013SP1, through Freelance 2016, through Freelance 2016SP1, through Freelance 2019, through Freelance 2019 SP1, through Freelance 2019 SP1 FP1.
The product checks a value to ensure that it is less than or equal to a maximum, but it does not also verify that the value is greater than or equal to the minimum.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Ac700f_firmware | Abb | 9.0.0 (including) | 9.2.0 (excluding) |
| Ac700f_firmware | Abb | 9.2.0 (including) | 9.2.0 (including) |
| Ac700f_firmware | Abb | 9.2.0-sp1 (including) | 9.2.0-sp1 (including) |
Some products use signed integers or floats even when their values are only expected to be positive or 0. An input validation check might assume that the value is positive, and only check for the maximum value. If the value is negative, but the code assumes that the value is positive, this can produce an error. The error may have security consequences if the negative value is used for memory allocation, array access, buffer access, etc. Ultimately, the error could lead to a buffer overflow or other type of memory corruption. The use of a negative number in a positive-only context could have security implications for other types of resources. For example, a shopping cart might check that the user is not requesting more than 10 items, but a request for -3 items could cause the application to calculate a negative price and credit the attacker’s account.