CVE-2021-22925
Summary
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.
Impact & exploitability
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected products we track (2)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf ↗
Additional information
- NVD record
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch
- https://hackerone.com/reports/1223882Patch
- http://seclists.org/fulldisclosure/2021/Sep/39Advisory
- http://seclists.org/fulldisclosure/2021/Sep/40Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdfAdvisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FRUCW2UVNYUDZF72DQLFQR4PJEC6CF7V/Advisory
- https://security.gentoo.org/glsa/202212-01Advisory
- https://security.netapp.com/advisory/ntap-20210902-0003/Advisory