Use of Uninitialized Resource Affecting curl package, versions <7.78.0-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.37% (74th percentile)

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  • Snyk IDSNYK-ALPINE318-CURL-5511918
  • published26 Jul 2021
  • disclosed5 Aug 2021

Introduced: 26 Jul 2021

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

How to fix?

Upgrade Alpine:3.18 curl to version 7.78.0-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream curl package and not the curl package as distributed by Alpine. See How to fix? for Alpine:3.18 relevant fixed versions and status.

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.

CVSS Scores

version 3.1