VDB-182482 · CVE-2021-39207 · GCVE-0-2021-39207

Facebook ParlAI up to 1.1.0 YAML deserialization

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.6	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Facebook ParlAI up to 1.1.0. It has been declared as critical. This vulnerability affects unknown code of the component YAML Handler. Executing a manipulation can lead to deserialization. This vulnerability is tracked as CVE-2021-39207. The attack can be launched remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Facebook ParlAI up to 1.1.0 (Social Network Software). It has been declared as critical. This vulnerability affects some unknown processing of the component YAML Handler. The manipulation with an unknown input leads to a deserialization vulnerability. The CWE definition for the vulnerability is CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was disclosed 09/11/2021. The advisory is available at github.com. This vulnerability was named CVE-2021-39207 since 08/16/2021. The technical details are unknown and an exploit is not available.

Upgrading to version 1.1.1 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Social Network Software

Vendor

Facebook

Name

ParlAI

Version

License

free

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.6

VulDB Base Score: 5.0
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 8.4
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Deserialization
CWE: CWE-502 / CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: ParlAI 1.1.1
Patch: github.com

Timelineinfo

08/16/2021 🔍
09/11/2021 +26 days 🔍
09/11/2021 +0 days 🔍
09/16/2021 +5 days 🔍

Sourcesinfo

Advisory: 4374fa2aba383db6526ab36e939eb1cf8ef99879
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-39207 (🔍)
GCVE (CVE): GCVE-0-2021-39207
GCVE (VulDB): GCVE-100-182482

Entryinfo

Created: 09/11/2021 07:14
Updated: 09/16/2021 09:24
Changes: 09/11/2021 07:14 (48), 09/11/2021 07:15 (1), 09/11/2021 07:16 (4), 09/16/2021 09:24 (3)
Complete: 🔍
Cache ID: 216::103