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CVE-2021-22898

Published: Jun 11, 2021Updated: Apr 16, 2026 Sources: CVE List NVD BDU csafCWE-200
NVD MITRE
3.1CVSSLOW
EPSS Score
4.4%
Top 10.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:RS:UC:LI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-200CWE-909

Affected Products

curlhaxxOSS Libraries
debian linuxdebian
On-premOS
Operating Systems / linux-distro
fedorafedoraproject
On-premOS
Operating Systems / linux-distro
communications cloud native core binding support functionoracle
On-prem
Databases / relational
communications cloud native core network function cloud native environmentoracle
On-premDatabase
Databases / data-warehouse-analytics
haxxoss-projectSEOSS Librariesaka haxx.se
debianoss-projectGBOperating Systemsaka debian gnu/linux
fedoraprojectoss-projectUSOperating Systemsaka fedora project
oraclecommercialUSDatabasesaka oracle corp.
and 24 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

http://www.openwall.com/lists/oss-security/2021/07/21/4
openwall.com
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
cert-portal.siemens.com
https://curl.se/docs/CVE-2021-22898.html
curl.se
and 34 more references View all →

Timeline

Published
Jun 11, 2021
Last Updated
Apr 16, 2026

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