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Cleartext Transmission of Sensitive Information Affecting libcurl package, versions <0:7.79.1-1.amzn2.0.1

Severity

 Recommended
medium

Based on Amazon Linux security rating

    Threat Intelligence

    EPSS
    0.3% (71st percentile)

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  • Snyk ID SNYK-AMZN2-LIBCURL-2315473
  • published 11 Dec 2021
  • disclosed 29 Sep 2021
Report a new vulnerability Found a mistake?

Introduced: 29 Sep 2021

CVE-2021-22946 Open this link in a new tab
CWE-319 Open this link in a new tab

How to fix?

Upgrade Amazon-Linux:2 libcurl to version 0:7.79.1-1.amzn2.0.1 or higher.
This issue was patched in ALAS2-2021-1724.

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.

A user can tell curl >= 7.20.0 and <= 7.78.0 to require a successful upgrade to TLS when speaking to an IMAP, POP3 or FTP server (--ssl-reqd on the command line orCURLOPT_USE_SSL set to CURLUSESSL_CONTROL or CURLUSESSL_ALL withlibcurl). This requirement could be bypassed if the server would return a properly crafted but perfectly legitimate response.This flaw would then make curl silently continue its operations withoutTLS contrary to the instructions and expectations, exposing possibly sensitive data in clear text over the network.

References

CVSS Scores

version 3.1
Expand this section

NVD

7.5 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    None
  • Availability (A)
    None
Expand this section

Red Hat

7.5 high
Expand this section

SUSE

5.9 medium