cURL up to 8.13.0 QUIC Certificate certificate validation

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in cURL up to 8.13.0. This vulnerability affects unknown code of the component QUIC Certificate Handler. This manipulation causes certificate validation. This vulnerability appears as CVE-2025-5025. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in cURL up to 8.13.0 and classified as critical. Affected by this vulnerability is an unknown functionality of the component QUIC Certificate 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 summary by CVE is:

libcurl supports *pinning* of the server certificate public key for HTTPS transfers. Due to an omission, this check is not performed when connecting with QUIC for HTTP/3, when the TLS backend is wolfSSL. Documentation says the option works with wolfSSL, failing to specify that it does not for QUIC and HTTP/3. Since pinning makes the transfer succeed if the pin is fine, users could unwittingly connect to an impostor server without noticing.

The weakness was presented by Hiroki Kurosawa. It is possible to read the advisory at curl.se. This vulnerability is known as CVE-2025-5025 since 05/21/2025. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. 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 237584 (Curl 8.5.0 < 8.14.0 Improper Certificate Validation (CVE-2025-5025)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 8.14.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (237584). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

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: 237584
Nessus Name: Curl 8.5.0 < 8.14.0 Improper Certificate Validation (CVE-2025-5025)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: cURL 8.14.0

Timelineinfo

05/21/2025 CVE reserved
05/28/2025 +7 days Advisory disclosed
05/28/2025 +0 days VulDB entry created
05/30/2025 +2 days VulDB entry last update

Sourcesinfo

Advisory: curl.se
Researcher: Hiroki Kurosawa
Status: Confirmed

CVE: CVE-2025-5025 (🔒)
GCVE (CVE): GCVE-0-2025-5025
GCVE (VulDB): GCVE-100-310423

Entryinfo

Created: 05/28/2025 08:38
Updated: 05/30/2025 18:21
Changes: 05/28/2025 08:38 (56), 05/28/2025 14:24 (1), 05/30/2025 18:21 (2)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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