cURL HSTS cleartext transmission

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability was found in cURL. It has been declared as problematic. The impacted element is an unknown function of the component HSTS Handler. The manipulation results in cleartext transmission. This vulnerability is cataloged as CVE-2023-23915. The attack may be launched remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in cURL (Network Utility Software) (version now known). It has been classified as problematic. Affected is some unknown processing of the component HSTS Handler. The manipulation with an unknown input leads to a cleartext transmission vulnerability. CWE is classifying the issue as CWE-319. The product transmits sensitive or security-critical data in cleartext in a communication channel that can be sniffed by unauthorized actors. This is going to have an impact on confidentiality. CVE summarizes:

A cleartext transmission of sensitive information vulnerability exists in curl <v7.88.0 that could cause HSTS functionality to behave incorrectly when multiple URLs are requested in parallel. Using its HSTS support, curl can be instructed to use HTTPS instead of using an insecure clear-text HTTP step even when HTTP is provided in the URL. This HSTS mechanism would however surprisingly fail when multiple transfers are done in parallel as the HSTS cache file gets overwritten by the most recentlycompleted transfer. A later HTTP-only transfer to the earlier host name would then *not* get upgraded properly to HSTS.

The weakness was shared 02/20/2023. The advisory is available at curl.se. This vulnerability is traded as CVE-2023-23915 since 01/19/2023. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1040 by the MITRE ATT&CK project.

Upgrading eliminates this vulnerability.

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Productinfo

Type

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

ADP CISA Base Score: 6.5
ADP CISA Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Cleartext transmission
CWE: CWE-319 / CWE-310
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/19/2023 🔍
02/20/2023 +32 days 🔍
02/20/2023 +0 days 🔍
02/13/2026 +1089 days 🔍

Sourcesinfo

Advisory: curl.se
Status: Confirmed

CVE: CVE-2023-23915 (🔍)
GCVE (CVE): GCVE-0-2023-23915
GCVE (VulDB): GCVE-100-221514

Entryinfo

Created: 02/20/2023 07:55
Updated: 02/13/2026 23:05
Changes: 02/20/2023 07:55 (37), 03/23/2023 13:33 (1), 03/23/2023 13:39 (11), 02/13/2026 23:05 (27)
Complete: 🔍
Cache ID: 216::103

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