Description
libcurl 7.1 through 7.57.0 might accidentally leak authentication data to third parties. When asked to send custom headers in its HTTP requests, libcurl will send that set of headers first to the host in the initial URL but also, if asked to follow redirects and a 30X HTTP response code is returned, to the host mentioned in URL in the `Location:` response header value. Sending the same set of headers to subsequent hosts is in particular a problem for applications that pass on custom `Authorization:` headers, as this header often contains privacy sensitive information or data that could allow others to impersonate the libcurl-using client's request.
Published: 2018-01-24
Score: 9.8 Critical
EPSS: 3.9% Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories
Source ID Title
Debian DSA Debian DSA DSA-4098-1 curl security update
EUVD EUVD EUVD-2018-1778 libcurl 7.1 through 7.57.0 might accidentally leak authentication data to third parties. When asked to send custom headers in its HTTP requests, libcurl will send that set of headers first to the host in the initial URL but also, if asked to follow redirects and a 30X HTTP response code is returned, to the host mentioned in URL in the `Location:` response header value. Sending the same set of headers to subsequent hosts is in particular a problem for applications that pass on custom `Authorization:` headers, as this header often contains privacy sensitive information or data that could allow others to impersonate the libcurl-using client's request.
Ubuntu USN Ubuntu USN USN-3554-1 curl vulnerabilities
Ubuntu USN Ubuntu USN USN-3554-2 curl vulnerability
History

Wed, 16 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.03066}

epss

{'score': 0.03148}


Subscriptions

Canonical Ubuntu Linux
Debian Debian Linux
Fujitsu M10-1 M10-1 Firmware M10-4 M10-4 Firmware M10-4s M10-4s Firmware M12-1 M12-1 Firmware M12-2 M12-2 Firmware M12-2s M12-2s Firmware
Haxx Curl
Redhat Enterprise Linux Enterprise Linux Desktop Enterprise Linux Server Enterprise Linux Server Aus Enterprise Linux Server Eus Enterprise Linux Workstation Jboss Core Services Rhel Aus Rhel E4s Rhel Eus Rhel Software Collections Rhel Tus
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-05T12:33:48.439Z

Reserved: 2018-01-22T00:00:00.000Z

Link: CVE-2018-1000007

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2018-01-24T22:29:00.353

Modified: 2024-11-21T03:39:24.663

Link: CVE-2018-1000007

cve-icon Redhat

Severity : Moderate

Publid Date: 2018-01-24T00:00:00Z

Links: CVE-2018-1000007 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses