| ID |
CVE-2020-7212
|
| Sažetak |
The _encode_invalid_chars function in util/url.py in the urllib3 library 1.25.2 through 1.25.7 for Python allows a denial of service (CPU consumption) because of an inefficient algorithm. The percent_encodings array contains all matches of percent encodings. It is not deduplicated. For a URL of length N, the size of percent_encodings may be up to O(N). The next step (normalize existing percent-encoded bytes) also takes up to O(N) for each step, so the total time is O(N^2). If percent_encodings were deduplicated, the time to compute _encode_invalid_chars would be O(kN), where k is at most 484 ((10+6*2)^2). |
| Reference |
|
| CVSS |
| Base: | 7.8 |
| Impact: | 6.9 |
| Exploitability: | 10.0 |
|
| Pristup |
| Vektor | Složenost | Autentikacija |
| NETWORK |
LOW |
NONE |
|
| Impact |
| Povjerljivost | Cjelovitost | Dostupnost |
| NONE |
NONE |
COMPLETE |
|
| CVSS vektor |
AV:N/AC:L/Au:N/C:N/I:N/A:C |
| Zadnje važnije ažuriranje |
09-03-2020 - 16:55 |
| Objavljeno |
06-03-2020 - 20:15 |
