Oracle Linux: CVE-2021-22925: ELSA-2021-4511: curl security and bug fix update (MODERATE) (Multiple Advisories)
Description
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. A flaw was found in the way curl handled telnet protocol option for sending environment variables, which could lead to sending of uninitialized data from a stack-based buffer to the server. This issue leads to potentially revealing sensitive internal information to the server using a clear-text network protocol.
Solution(s)
- oracle-linux-upgrade-curl
- oracle-linux-upgrade-kernel-debug
- oracle-linux-upgrade-libcurl
- oracle-linux-upgrade-libcurl-devel
- oracle-linux-upgrade-libcurl-minimal
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