Use of Uninitialized Resource Affecting curl package, versions [7.7,7.78.0)


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.55% (78th percentile)

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  • Snyk IDSNYK-UNMANAGED-CURL-2317567
  • published14 Dec 2021
  • 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 curl to version 7.78.0 or higher.

Overview

curl is a command line tool and library for transferring data with URL syntax, supporting DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, POP3, POP3S, RTMP, RTMPS, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, TELNET and TFTP. libcurl offers a myriad of powerful features.

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 Scores

version 3.1