CVE-2021-22925

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CVE-2021-22925

Summary:

Details: curl supports the `-t` command line option, known as `CURLOPT_TELNETOPTIONS`in 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: http://seclists.org/fulldisclosure/2021/Sep/39, http://seclists.org/fulldisclosure/2021/Sep/40, https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FRUCW2UVNYUDZF72DQLFQR4PJEC6CF7V/, https://security.gentoo.org/glsa/202212-01, https://security.netapp.com/advisory/ntap-20210902-0003/, https://support.apple.com/kb/HT212804, https://support.apple.com/kb/HT212805, https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf, https://hackerone.com/reports/1223882, https://www.oracle.com/security-alerts/cpujan2022.html, https://www.oracle.com/security-alerts/cpuoct2021.html