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Cleartext Transmission of Sensitive Information Affecting libcurl-devel package, versions <0:7.61.1-18.el8_4.2

Severity

 Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    EPSS
    0.1% (43rd percentile)

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  • Snyk ID SNYK-RHEL8-LIBCURLDEVEL-1585218
  • published 15 Sep 2021
  • disclosed 15 Sep 2021
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Introduced: 15 Sep 2021

CVE-2021-22947 Open this link in a new tab
CWE-319 Open this link in a new tab

How to fix?

Upgrade RHEL:8 libcurl-devel to version 0:7.61.1-18.el8_4.2 or higher.
This issue was patched in RHSA-2021:4059.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libcurl-devel package and not the libcurl-devel package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

When curl >= 7.20.0 and <= 7.78.0 connects to an IMAP or POP3 server to retrieve data using STARTTLS to upgrade to TLS security, the server can respond and send back multiple responses at once that curl caches. curl would then upgrade to TLS but not flush the in-queue of cached responses but instead continue using and trustingthe responses it got before the TLS handshake as if they were authenticated.Using this flaw, it allows a Man-In-The-Middle attacker to first inject the fake responses, then pass-through the TLS traffic from the legitimate server and trick curl into sending data back to the user thinking the attacker's injected data comes from the TLS-protected server.

References

CVSS Scores

version 3.1
Expand this section

NVD

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

Red Hat

6.1 medium
Expand this section

SUSE

5.9 medium