libcurl Connection Pool certificate validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability was found in libcurl. It has been rated as critical. The impacted element is an unknown function of the component Connection Pool Handler. This manipulation causes certificate validation. This vulnerability is tracked as CVE-2021-22924. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in libcurl (Network Utility Software) (version unknown). It has been declared as critical. Affected by this vulnerability is an unknown function of the component Connection Pool Handler. The manipulation with an unknown input leads to a certificate validation vulnerability. The CWE definition for the vulnerability is CWE-295. The product does not validate, or incorrectly validates, a certificate. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was disclosed 08/06/2021. It is possible to read the advisory at hackerone.com. This vulnerability is known as CVE-2021-22924. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1587.003 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 236733 (Alibaba Cloud Linux 3 : 0070: curl (ALINUX3-SA-2021:0070)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (236733). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 3.7
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Certificate validation
CWE: CWE-295 / CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 236733
Nessus Name: Alibaba Cloud Linux 3 : 0070: curl (ALINUX3-SA-2021:0070)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/06/2021 🔍
08/06/2021 +211 days 🔍
08/06/2021 +0 days 🔍
06/09/2025 +1403 days 🔍

Sourcesinfo

Advisory: hackerone.com
Status: Not defined

CVE: CVE-2021-22924 (🔍)
GCVE (CVE): GCVE-0-2021-22924
GCVE (VulDB): GCVE-100-180187

Entryinfo

Created: 08/06/2021 07:34
Updated: 06/09/2025 18:01
Changes: 08/06/2021 07:34 (35), 08/10/2021 07:22 (2), 05/16/2025 13:43 (16), 06/09/2025 18:01 (19)
Complete: 🔍
Cache ID: 216::103

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

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