Untrusted search path vulnerability in Multiple Yayoi 17 Series products (Yayoi Kaikei 17 Series Ver.23.1.1 and earlier, Yayoi Aoiro Shinkoku 17 Ver.23.1.1 and earlier, Yayoi Kyuuyo 17 Ver.20.1.4 and earlier, Yayoi Kyuuyo Keisan 17 Ver.20.1.4 and earlier, Yayoi Hanbai 17 Series Ver.20.0.2 and earlier, and Yayoi Kokyaku Kanri 17 Ver.11.0.2 and earlier) allows an attacker to gain privileges via a Trojan horse DLL in an unspecified directory. This flaw exists within the handling of ykkapi.dll loaded by the vulnerable products.
The product searches for critical resources using an externally-supplied search path that can point to resources that are not under the product’s direct control.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Kaikei | Yayoi-kk | * | 23.1.1 |
| Aoiro_shinkoku | Yayoi-kk | * | 23.1.1 |
| Kyuuyo | Yayoi-kk | * | 20.1.4 |
| Kyuuyo_keisan | Yayoi-kk | * | 20.1.4 |
| Hanbai | Yayoi-kk | * | 20.0.2 |
| Kokyaku_kanri | Yayoi-kk | * | 11.0.2 |
This might allow attackers to execute their own programs, access unauthorized data files, or modify configuration in unexpected ways. If the product uses a search path to locate critical resources such as programs, then an attacker could modify that search path to point to a malicious program, which the targeted product would then execute. The problem extends to any type of critical resource that the product trusts. Some of the most common variants of untrusted search path are: