CVE-2021-28676
python-pillow: Infinite loop in FLI image reader
Severity Score
7.5
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
An issue was discovered in Pillow before 8.2.0. For FLI data, FliDecode did not properly check that the block advance was non-zero, potentially leading to an infinite loop on load.
Se detectó un problema en Pillow versiones anteriores a 8.2.0,. En el caso de los datos FLI, la función FliDecode no comprobaba correctamente que el avance del bloque fuera distinto de cero, lo que podía conllevar un bucle infinito en la carga
A flaw was found in python-pillow. FliDecode.c did not properly check that the block advance was non-zero, potentially leading to an infinite loop on load. This issue dates to the PIL fork. The highest threat from this vulnerability is to system availability.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2021-03-18 CVE Reserved
- 2021-06-02 CVE Published
- 2024-02-16 EPSS Updated
- 2024-08-03 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')
CAPEC
References (8)
| URL | Tag | Source |
|---|---|---|
| https://github.com/python-pillow/Pillow/pull/5377 | Third Party Advisory | |
| https://lists.debian.org/debian-lts-announce/2021/07/msg00018.html | Mailing List |
|
| https://pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html#cve-2021-28676-fix-fli-dos | Release Notes |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://github.com/python-pillow/Pillow/commit/bb6c11fb889e6c11b0ee122b828132ee763b5856 | 2023-12-22 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Python Search vendor "Python" | Pillow Search vendor "Python" for product "Pillow" | < 8.2.0 Search vendor "Python" for product "Pillow" and version " < 8.2.0" | - |
Affected
| ||||||
| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 33 Search vendor "Fedoraproject" for product "Fedora" and version "33" | - |
Affected
| ||||||