libcurl 8.0.0 authentication bypass

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

Summaryinfo

A vulnerability categorized as critical has been discovered in libcurl 8.0.0. Affected is an unknown function. The manipulation results in authentication bypass. This vulnerability is reported as CVE-2023-27538. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, was found in libcurl 8.0.0 (Network Utility Software). Affected is an unknown functionality. The manipulation with an unknown input leads to a authentication bypass vulnerability. CWE is classifying the issue as CWE-305. The authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

An authentication bypass vulnerability exists in libcurl v8.0.0 where it reuses a previously established SSH connection despite the fact that an SSH option was modified, which should have prevented reuse. libcurl maintains a pool of previously used connections to reuse them for subsequent transfers if the configurations match. However, two SSH settings were omitted from the configuration check, allowing them to match easily, potentially leading to the reuse of an inappropriate connection.

The weakness was disclosed 03/31/2023. The advisory is shared for download at hackerone.com. This vulnerability is traded as CVE-2023-27538 since 03/02/2023. There are neither technical details nor an exploit publicly available.

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

Once again VulDB remains the best 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: 5.5
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.5
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Authentication bypass
CWE: CWE-305 / CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/02/2023 🔍
03/31/2023 +28 days 🔍
03/31/2023 +0 days 🔍
04/20/2023 +20 days 🔍

Sourcesinfo

Advisory: FEDORA-2023-7e7414e64d
Status: Not defined

CVE: CVE-2023-27538 (🔍)
GCVE (CVE): GCVE-0-2023-27538
GCVE (VulDB): GCVE-100-224652

Entryinfo

Created: 03/31/2023 09:11
Updated: 04/20/2023 19:58
Changes: 03/31/2023 09:11 (36), 04/20/2023 19:51 (1), 04/20/2023 19:58 (9)
Complete: 🔍
Cache ID: 216::103

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