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CVE-2018-1000007

CRITICALCVSS 9.8/10EPSS 8.03%

Last modified

CVE-2018-1000007 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 8.03% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
8.03%

94.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
HaxxCurl>= 7.1, <= 7.57.0
DebianDebian Linux7.0
DebianDebian Linux8.0
DebianDebian Linux9.0
CanonicalUbuntu Linux12.04
CanonicalUbuntu Linux14.04
CanonicalUbuntu Linux16.04
CanonicalUbuntu Linux17.10
RedhatEnterprise Linux Desktop7.0
RedhatEnterprise Linux Server7.0
RedhatEnterprise Linux Server Aus7.4
RedhatEnterprise Linux Server Eus7.4
RedhatEnterprise Linux Server Eus7.5
RedhatEnterprise Linux Workstation7.0
FujitsuM10-1 Firmware< xcp2361
FujitsuM10-4 Firmware< xcp2361
FujitsuM10-4s Firmware< xcp2361
FujitsuM12-1 Firmware< xcp2361
FujitsuM12-2 Firmware< xcp2361
FujitsuM12-2s Firmware< xcp2361
FujitsuM10-1 Firmware< xcp3070
FujitsuM10-4 Firmware< xcp3070
FujitsuM10-4s Firmware< xcp3070
FujitsuM12-1 Firmware< xcp3070
FujitsuM12-2 Firmware< xcp3070
FujitsuM12-2s Firmware< xcp3070

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2018-1000007?
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.
How severe is CVE-2018-1000007?
CVE-2018-1000007 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 8.03% probability of exploitation in the next 30 days.
How do I fix CVE-2018-1000007?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST