Use of Uninitialized Resource Affecting libcurl package, versions [7.76.0,7.78.0)


Severity

Recommended
0.0
medium
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.41% (61st percentile)

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  • Snyk IDSNYK-CONAN-LIBCURL-10076429
  • published8 May 2025
  • disclosed5 Aug 2021
  • creditUnknown

Introduced: 5 Aug 2021

CVE-2021-22925  (opens in a new tab)
CWE-908  (opens in a new tab)

How to fix?

Upgrade libcurl to version 7.78.0 or higher.

Overview

Affected versions of this package are vulnerable to Use of Uninitialized Resource curl supports the -t command line option, known as CURLOPT_TELNETOPTIONSin libcurl. This rarely used option is used to send variable=content pairs toTELNET servers.Due to flaw in the option parser for sending NEW_ENV variables, libcurlcould be made to pass on uninitialized data from a stack based buffer to theserver. Therefore potentially revealing sensitive internal information to theserver using a clear-text network protocol.This could happen because curl did not call and use sscanf() correctly whenparsing the string provided by the application.

References

CVSS Base Scores

version 3.1