CURL-CVE-2021-22946

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Source
https://curl.se/docs/CVE-2021-22946.html
Import Source
https://curl.se/docs/CURL-CVE-2021-22946.json
JSON Data
https://api.osv.dev/v1/vulns/CURL-CVE-2021-22946
Aliases
Published
2021-09-15T08:00:00Z
Modified
2024-06-07T13:53:51Z
Summary
Protocol downgrade required TLS bypassed
Details

A user can tell curl to require a successful upgrade to TLS when speaking to an IMAP, POP3 or FTP server (--ssl-reqd on the command line or CURLOPT_USE_SSL set to CURLUSESSL_CONTROL or CURLUSESSL_ALL with libcurl). 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 without TLS contrary to the instructions and expectations, exposing possibly sensitive data in clear text over the network.

References
Credits
    • Patrick Monnerat - FINDER
    • Patrick Monnerat - REMEDIATION_DEVELOPER

Affected packages

Git / github.com/curl/curl.git

Affected ranges

Type
SEMVER
Events
Introduced
7.20.0
Fixed
7.79.0
Type
GIT
Repo
https://github.com/curl/curl.git
Events
Introduced
ec3bb8f727405642a471b4b1b9eb0118fc003104
Fixed
364f174724ef115c63d5e5dc1d3342c8a43b1cca

Affected versions

7.*

7.20.0
7.20.1
7.21.0
7.21.1
7.21.2
7.21.3
7.21.4
7.21.5
7.21.6
7.21.7
7.22.0
7.23.0
7.23.1
7.24.0
7.25.0
7.26.0
7.27.0
7.28.0
7.28.1
7.29.0
7.30.0
7.31.0
7.32.0
7.33.0
7.34.0
7.35.0
7.36.0
7.37.0
7.37.1
7.38.0
7.39.0
7.40.0
7.41.0
7.42.0
7.42.1
7.43.0
7.44.0
7.45.0
7.46.0
7.47.0
7.47.1
7.48.0
7.49.0
7.49.1
7.50.0
7.50.1
7.50.2
7.50.3
7.51.0
7.52.0
7.52.1
7.53.0
7.53.1
7.54.0
7.54.1
7.55.0
7.55.1
7.56.0
7.56.1
7.57.0
7.58.0
7.59.0
7.60.0
7.61.0
7.61.1
7.62.0
7.63.0
7.64.0
7.64.1
7.65.0
7.65.1
7.65.2
7.65.3
7.66.0
7.67.0
7.68.0
7.69.0
7.69.1
7.70.0
7.71.0
7.71.1
7.72.0
7.73.0
7.74.0
7.75.0
7.76.0
7.76.1
7.77.0
7.78.0