CVE-2021-22946

7.5 HIGH
Published: September 29, 2021 Modified: April 16, 2026
View on NVD

Description

A user can tell curl >= 7.20.0 and <= 7.78.0 to require a successful upgrade to TLS when speaking to an IMAP, POP3 or FTP server (`--ssl-reqd` on the command line or`CURLOPT_USE_SSL` set to `CURLUSESSL_CONTROL` or `CURLUSESSL_ALL` withlibcurl). This requirement could be bypassed if the server would return a properly crafted but perfectly legitimate response.This flaw would then make curl silently continue its operations **withoutTLS** contrary to the instructions and expectations, exposing possibly sensitive data in clear text over the network.

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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:H/I:N/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://seclists.org/fulldisclosure/2022/Mar/29
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://hackerone.com/reports/1334111
Source: support@hackerone.com
Exploit Issue Tracking Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/09/msg00022.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
Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/
Source: support@hackerone.com
Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/
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-20211029-0003/
Source: support@hackerone.com
Third Party Advisory
https://security.netapp.com/advisory/ntap-20220121-0008/
Source: support@hackerone.com
Third Party Advisory
https://support.apple.com/kb/HT213183
Source: support@hackerone.com
Release Notes Third Party Advisory
https://www.debian.org/security/2022/dsa-5197
Source: support@hackerone.com
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
Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.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/2022/Mar/29
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://hackerone.com/reports/1334111
Source: af854a3a-2127-422b-91ae-364da2661108
Exploit Issue Tracking Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/09/msg00022.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
Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/
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-20211029-0003/
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://security.netapp.com/advisory/ntap-20220121-0008/
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://support.apple.com/kb/HT213183
Source: af854a3a-2127-422b-91ae-364da2661108
Release Notes 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/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
Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.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

32 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.5 / 10.0
EPSS (Exploit Probability)
0.1%
19th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-325 CWE-319 CWE-319

Affected Vendors

debian siemens apple fedoraproject splunk haxx oracle netapp

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