CVE-2018-1000656
Flask Unvalidated JSON Denial of Service
Description
The Pallets Project flask version Before 0.12.3 contains a CWE-20: Improper Input Validation vulnerability in flask that can result in Large amount of memory usage possibly leading to denial of service. This attack appear to be exploitable via Attacker provides JSON data in incorrect encoding. This vulnerability appears to have been fixed in 0.12.3. NOTE: this may overlap CVE-2019-1010083.
INFO
Published Date :
Aug. 20, 2018, 7:31 p.m.
Last Modified :
Nov. 21, 2024, 3:40 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
                                            The following products are affected by CVE-2018-1000656
                                            vulnerability.
                                            Even if cvefeed.io is aware of the exact versions of the
                                            products
                                            that
                                            are
                                            affected, the information is not represented in the table below.
                                        
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source | 
|---|---|---|---|---|---|---|
| CVSS 2.0 | MEDIUM | [email protected] | ||||
| CVSS 3.0 | HIGH | [email protected] | 
Solution
- Upgrade to Flask version 0.12.3 or later.
- Update the affected python-flask package.
Public PoC/Exploit Available at Github
                                            CVE-2018-1000656 has a 20 public
                                            PoC/Exploit available at Github.
                                            Go to the Public Exploits tab to see the list.
                                        
References to Advisories, Solutions, and Tools
                                            Here, you will find a curated list of external links that provide in-depth
                                            information, practical solutions, and valuable tools related to
                                            CVE-2018-1000656.
                                        
| URL | Resource | 
|---|---|
| https://github.com/pallets/flask/pull/2691 | Issue Tracking Patch Third Party Advisory | 
| https://github.com/pallets/flask/releases/tag/0.12.3 | Third Party Advisory | 
| https://lists.debian.org/debian-lts-announce/2019/08/msg00025.html | |
| https://security.netapp.com/advisory/ntap-20190221-0001/ | Patch Third Party Advisory | 
| https://usn.ubuntu.com/4378-1/ | |
| https://github.com/pallets/flask/pull/2691 | Issue Tracking Patch Third Party Advisory | 
| https://github.com/pallets/flask/releases/tag/0.12.3 | Third Party Advisory | 
| https://lists.debian.org/debian-lts-announce/2019/08/msg00025.html | |
| https://security.netapp.com/advisory/ntap-20190221-0001/ | Patch Third Party Advisory | 
| https://usn.ubuntu.com/4378-1/ | 
CWE - Common Weakness Enumeration
            While CVE identifies
            specific instances of vulnerabilities, CWE categorizes the common flaws or
            weaknesses that can lead to vulnerabilities. CVE-2018-1000656 is
            associated with the following CWEs:
        
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
            (CAPEC)
            stores attack patterns, which are descriptions of the common attributes and
            approaches employed by adversaries to exploit the CVE-2018-1000656
            weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Dockerfile Python HCL
None
None
None
Python
This repository explores how Code scanning details can be added to the attestation process on merge.
Python Shell
Submit to AAAI related data and code
None
Python
None
Dockerfile Python HCL
This is a repository for IJCAI 2025
AI_Malware_Static&Dynamic_Analysis
Audits Python environments, requirements files and dependency trees for known security vulnerabilities, and can automatically fix them
pip python security security-audit supply-chain
Makefile Python
Pulsecheck - Get current and historical vulnerability insights from the GItHub Advisory Database https://github.com/advisories/database, by checking the pulse of your project’s dependencies delivered in an easy-to-use CLI.
Python
None
Python
None
Makefile Python
None
Python
Results are limited to the first 15 repositories due to potential performance issues.
			The following list is the news that have been mention
			CVE-2018-1000656 vulnerability anywhere in the article.
		
                The following table lists the changes that have been made to the
                CVE-2018-1000656 vulnerability over time.
            
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
- 
                            CVE Modified by af854a3a-2127-422b-91ae-364da2661108Nov. 21, 2024 Action Type Old Value New Value Added Reference https://github.com/pallets/flask/pull/2691 Added Reference https://github.com/pallets/flask/releases/tag/0.12.3 Added Reference https://lists.debian.org/debian-lts-announce/2019/08/msg00025.html Added Reference https://security.netapp.com/advisory/ntap-20190221-0001/ Added Reference https://usn.ubuntu.com/4378-1/ 
- 
                            CVE Modified by [email protected]May. 14, 2024 Action Type Old Value New Value 
- 
                            CVE Modified by [email protected]Jun. 09, 2020 Action Type Old Value New Value Added Reference https://usn.ubuntu.com/4378-1/ [No Types Assigned] 
- 
                            CVE Modified by [email protected]Aug. 25, 2019 Action Type Old Value New Value Changed Description The Pallets Project flask version Before 0.12.3 contains a CWE-20: Improper Input Validation vulnerability in flask that can result in Large amount of memory usage possibly leading to denial of service. This attack appear to be exploitable via Attacker provides JSON data in incorrect encoding. This vulnerability appears to have been fixed in 0.12.3. The Pallets Project flask version Before 0.12.3 contains a CWE-20: Improper Input Validation vulnerability in flask that can result in Large amount of memory usage possibly leading to denial of service. This attack appear to be exploitable via Attacker provides JSON data in incorrect encoding. This vulnerability appears to have been fixed in 0.12.3. NOTE: this may overlap CVE-2019-1010083. 
- 
                            CVE Modified by [email protected]Aug. 20, 2019 Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2019/08/msg00025.html [No Types Assigned] 
- 
                            Modified Analysis by [email protected]Feb. 28, 2019 Action Type Old Value New Value Changed Reference Type https://security.netapp.com/advisory/ntap-20190221-0001/ No Types Assigned https://security.netapp.com/advisory/ntap-20190221-0001/ Patch, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:netapp:active_iq:*:*:*:*:*:*:*:* *cpe:2.3:a:netapp:hyper_converged_infrastructure:*:*:*:*:*:*:*:* *cpe:2.3:a:netapp:ontap_select_deploy_utility:*:*:*:*:*:*:*:* 
- 
                            CVE Modified by [email protected]Feb. 22, 2019 Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20190221-0001/ [No Types Assigned] 
- 
                            Initial Analysis by [email protected]Oct. 29, 2018 Action Type Old Value New Value Added CVSS V2 (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://github.com/pallets/flask/pull/2691 No Types Assigned https://github.com/pallets/flask/pull/2691 Issue Tracking, Patch, Third Party Advisory Changed Reference Type https://github.com/pallets/flask/releases/tag/0.12.3 No Types Assigned https://github.com/pallets/flask/releases/tag/0.12.3 Third Party Advisory Added CWE CWE-20 Added CPE Configuration OR *cpe:2.3:a:palletsprojects:flask:*:*:*:*:*:*:*:* versions up to (excluding) 0.12.3 
Vulnerability Scoring Details
Base CVSS Score: 7.5
Base CVSS Score: 5
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.43 }} 0.11%
score
0.61776
percentile
 
                         
                         
                         
                                             
                                            