What’s Vulnerable › Vulnerabilities
CVE-2018-1000007
- Severity: critical (CVSS 9.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 9.9% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2018-01-24 · updated 2026-06-17
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.
Affected products
- Canonical Ubuntu Linux: 12.04, 14.04, 16.04, 17.10
- Debian Linux: 7.0, 8.0, 9.0
- Fujitsu M10-1 Firmware: before xcp2361; before xcp3070 — fixed in xcp2361, xcp3070
- Fujitsu M10-4 Firmware: before xcp2361; before xcp3070 — fixed in xcp2361, xcp3070
- Fujitsu M10-4S Firmware: before xcp2361; before xcp3070 — fixed in xcp2361, xcp3070
- Fujitsu M12-1 Firmware: before xcp2361; before xcp3070 — fixed in xcp2361, xcp3070
- Fujitsu M12-2 Firmware: before xcp2361; before xcp3070 — fixed in xcp2361, xcp3070
- Fujitsu M12-2S Firmware: before xcp2361; before xcp3070 — fixed in xcp2361, xcp3070
- curl: from 7.1 through 7.57.0
- RedHat Enterprise Linux Desktop: 7.0
- RedHat Enterprise Linux Server: 7.0
- RedHat Enterprise Linux Server Aus: 7.4
- RedHat Enterprise Linux Server Eus: 7.4, 7.5
- RedHat Enterprise Linux Workstation: 7.0
How to fix
Upgrade to a fixed version: Fujitsu M10-1 Firmware xcp2361, xcp3070; Fujitsu M10-4 Firmware xcp2361, xcp3070; Fujitsu M10-4S Firmware xcp2361, xcp3070; Fujitsu M12-1 Firmware xcp2361, xcp3070; Fujitsu M12-2 Firmware xcp2361, xcp3070; Fujitsu M12-2S Firmware xcp2361, xcp3070. Check the vendor advisory for mitigations.
References
- http://www.openwall.com/lists/oss-security/2022/04/27/4
- http://www.securitytracker.com/id/1040274
- https://access.redhat.com/errata/RHBA-2019:0327
- https://access.redhat.com/errata/RHSA-2018:3157
- https://access.redhat.com/errata/RHSA-2018:3558
- https://access.redhat.com/errata/RHSA-2019:1543
- https://access.redhat.com/errata/RHSA-2020:0544
- https://access.redhat.com/errata/RHSA-2020:0594
- https://curl.haxx.se/docs/adv_2018-b3bf.html
- https://lists.debian.org/debian-lts-announce/2018/01/msg00038.html
- https://usn.ubuntu.com/3554-1/
- https://usn.ubuntu.com/3554-2/
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