CVE-2021-22925

5.3 MEDIUM
Published: August 05, 2021 Modified: April 16, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/39
Source: support@hackerone.com
Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/40
Source: support@hackerone.com
Mailing List Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
Source: support@hackerone.com
Patch Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
Source: support@hackerone.com
Third Party Advisory
https://hackerone.com/reports/1223882
Source: support@hackerone.com
Exploit Issue Tracking Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FRUCW2UVNYUDZF72DQLFQR4PJEC6CF7V/
Source: support@hackerone.com
Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202212-01
Source: support@hackerone.com
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210902-0003/
Source: support@hackerone.com
Third Party Advisory
https://support.apple.com/kb/HT212804
Source: support@hackerone.com
Third Party Advisory
https://support.apple.com/kb/HT212805
Source: support@hackerone.com
Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.html
Source: support@hackerone.com
Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.html
Source: support@hackerone.com
Patch Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/39
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/40
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://hackerone.com/reports/1223882
Source: af854a3a-2127-422b-91ae-364da2661108
Exploit Issue Tracking Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FRUCW2UVNYUDZF72DQLFQR4PJEC6CF7V/
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202212-01
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210902-0003/
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://support.apple.com/kb/HT212804
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://support.apple.com/kb/HT212805
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.html
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.html
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Third Party Advisory

24 reference(s) from NVD

Quick Stats

CVSS v3 Score
5.3 / 10.0
EPSS (Exploit Probability)
0.4%
62th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-200 CWE-908

Affected Vendors

fedoraproject apple netapp siemens splunk haxx oracle

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