CVE-2021-22946
- State
- Published
- Severity
- 7.5 High
- Published
- Sep 29, 2021
- Updated
- Oct 14, 2026
- Reserved
- Jan 6, 2021
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N | CISA-ADP |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
https://github.com/curl/curln/a |
|
References
- https://hackerone.com/reports/1334111
- [debian-lts-announce] 20210930 [SECURITY] [DLA 2773-1] curl security updatemailing-list
- FEDORA-2021-fc96a3a749vendor-advisory
- https://www.oracle.com/security-alerts/cpuoct2021.html
- FEDORA-2021-1d24845e93vendor-advisory
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://security.netapp.com/advisory/ntap-20211029-0003/
- https://security.netapp.com/advisory/ntap-20220121-0008/
- 20220314 APPLE-SA-2022-03-14-4 macOS Monterey 12.3mailing-list
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
- https://support.apple.com/kb/HT213183
- https://www.oracle.com/security-alerts/cpujul2022.html
- DSA-5197vendor-advisory
- [debian-lts-announce] 20220828 [SECURITY] [DLA 3085-1] curl security updatemailing-list
- GLSA-202212-01vendor-advisory
- https://cert-portal.siemens.com/productcert/html/ssa-389290.html
- https://cert-portal.siemens.com/productcert/html/ssa-146325.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
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