Facebook ParlAI up to 1.0.x YAML deserialization

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Facebook ParlAI up to 1.0.x. It has been rated as critical. This issue affects some unknown processing of the component YAML Handler. The manipulation leads to deserialization. This vulnerability is listed as CVE-2021-24040. The attack may be initiated remotely. In addition, an exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Facebook ParlAI up to 1.0.x (Social Network Software). It has been rated as critical. This issue affects an unknown function of the component YAML Handler. The manipulation with an unknown input leads to a deserialization vulnerability. Using CWE to declare the problem leads to CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. Impacted is confidentiality, integrity, and availability.

The weakness was presented 09/11/2021. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2021-24040 since 01/13/2021. Technical details are unknown but a public exploit is available.

The exploit is available at packetstormsecurity.com. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $5k-$25k.

Upgrading to version 1.1.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Exploit-DB (50289). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: ParlAI 1.1.0

Timelineinfo

01/13/2021 🔍
09/11/2021 +240 days 🔍
09/11/2021 +0 days 🔍
01/13/2025 +1220 days 🔍

Sourcesinfo

Advisory: 164136
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-24040 (🔍)
GCVE (CVE): GCVE-0-2021-24040
GCVE (VulDB): GCVE-100-182483
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/11/2021 07:15
Updated: 01/13/2025 15:41
Changes: 09/11/2021 07:15 (40), 09/11/2021 07:31 (2), 09/16/2021 09:27 (3), 07/02/2024 12:58 (23), 01/13/2025 15:41 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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