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Red Hat: CVE-2021-22898: TELNET stack contents disclosure (Multiple Advisories)

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Red Hat: CVE-2021-22898: TELNET stack contents disclosure (Multiple Advisories)

Severity
3
CVSS
(AV:N/AC:H/Au:N/C:P/I:N/A:N)
Published
06/11/2021
Created
11/11/2021
Added
11/10/2021
Modified
12/15/2023

Description

curl 7.7 through 7.76.1 suffers from an information disclosure when the `-t` command line option, known as `CURLOPT_TELNETOPTIONS` in libcurl, is used to send variable=content pairs to TELNET servers. Due to a flaw in the option parser for sending NEW_ENV variables, libcurl could be made to pass on uninitialized data from a stack based buffer to the server, resulting in potentially revealing sensitive internal information to the server using a clear-text network protocol.

Solution(s)

  • redhat-upgrade-curl
  • redhat-upgrade-curl-debuginfo
  • redhat-upgrade-curl-debugsource
  • redhat-upgrade-curl-minimal-debuginfo
  • redhat-upgrade-libcurl
  • redhat-upgrade-libcurl-debuginfo
  • redhat-upgrade-libcurl-devel
  • redhat-upgrade-libcurl-minimal
  • redhat-upgrade-libcurl-minimal-debuginfo

References

  • DSA-5197
  • CVE-2021-22898
  • RHSA-2021:4511

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