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Information Exposure Affecting libcurl package, versions <0:7.55.1-9.amzn2.0.1

Severity

 Recommended
high

Based on Amazon Linux security rating

    Threat Intelligence

    EPSS
    0.57% (79th percentile)

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  • Snyk ID SNYK-AMZN2-LIBCURL-1660916
  • published 27 Sep 2021
  • disclosed 24 Jan 2018
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Introduced: 24 Jan 2018

CVE-2018-1000007 Open this link in a new tab
CWE-200 Open this link in a new tab

How to fix?

Upgrade Amazon-Linux:2 libcurl to version 0:7.55.1-9.amzn2.0.1 or higher.
This issue was patched in ALAS2-2018-951.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libcurl package and not the libcurl package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

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.

CVSS Scores

version 3.1
Expand this section

NVD

9.8 critical
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    High