CVE-2021-22898

3.1 LOW
Published: June 11, 2021 Modified: April 16, 2026
View on NVD

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.

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CVSS v3.x Details

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

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/07/21/4
Source: support@hackerone.com
Mailing List Patch Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
Source: support@hackerone.com
Patch Third Party Advisory
https://curl.se/docs/CVE-2021-22898.html
Source: support@hackerone.com
Exploit Patch Vendor Advisory
https://github.com/curl/curl/commit/39ce47f219b09c380b81f89fe54ac586c8db6bde
Source: support@hackerone.com
Patch Third Party Advisory
https://hackerone.com/reports/1176461
Source: support@hackerone.com
Exploit Issue Tracking Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/08/msg00017.html
Source: support@hackerone.com
Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/08/msg00017.html
Source: support@hackerone.com
Third Party Advisory
https://www.debian.org/security/2022/dsa-5197
Source: support@hackerone.com
Third Party Advisory
https://www.oracle.com//security-alerts/cpujul2021.html
Source: support@hackerone.com
Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html
Source: support@hackerone.com
Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.html
Source: support@hackerone.com
Patch Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/07/21/4
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Patch Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Third Party Advisory
https://curl.se/docs/CVE-2021-22898.html
Source: af854a3a-2127-422b-91ae-364da2661108
Exploit Patch Vendor Advisory
https://github.com/curl/curl/commit/39ce47f219b09c380b81f89fe54ac586c8db6bde
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Third Party Advisory
https://hackerone.com/reports/1176461
Source: af854a3a-2127-422b-91ae-364da2661108
Exploit Issue Tracking Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/08/msg00017.html
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/08/msg00017.html
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://www.debian.org/security/2022/dsa-5197
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://www.oracle.com//security-alerts/cpujul2021.html
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.html
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Third Party Advisory

28 reference(s) from NVD

Quick Stats

CVSS v3 Score
3.1 / 10.0
EPSS (Exploit Probability)
0.1%
32th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

splunk haxx debian siemens fedoraproject oracle