Due to an incomplete fix for CVE-2012-6125, all versions of CHICKEN Scheme up to and including 4.12.0 are vulnerable to an algorithmic complexity attack. An attacker can provide crafted input which, when inserted into the symbol table, will result in O(n) lookup time.
Weakness
An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Chicken | Call-cc | * | 4.12.0 (including) |
| Chicken | Ubuntu | artful | * |
| Chicken | Ubuntu | esm-apps/xenial | * |
| Chicken | Ubuntu | trusty | * |
| Chicken | Ubuntu | upstream | * |
| Chicken | Ubuntu | xenial | * |
| Chicken | Ubuntu | yakkety | * |
| Chicken | Ubuntu | zesty | * |