PT-2021-5833 · Curl+10 · Curl+10
Published
2021-07-21
·
Updated
2026-05-18
·
CVE-2021-22925
CVSS v3.1
5.3
Medium
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
Name of the Vulnerable Software and Affected Versions
curl (affected versions not specified)
Description
The issue is related to the use of an uninitialized resource in the cURL command-line tool. It affects the
-t command line option, also known as CURLOPT TELNETOPTIONS in libcurl, which 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, potentially revealing sensitive internal information to the server using a clear-text network protocol. This could happen because curl did not call and use sscanf() correctly when parsing the string provided by the application.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
DoS
Information Disclosure
Use of Uninitialized Resource
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Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Centos
Linuxmint
Apple Macos
Red Hat
Rocky Linux
Suse
Ubuntu
Curl