CVE-2021-22946
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 4.5%
exploitation probability
4.5%top 9% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected products
n/a · https://github.com/curl/curlReferences
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfhttp://seclists.org/fulldisclosure/2022/Mar/29https://hackerone.com/reports/1334111https://lists.debian.org/debian-lts-announce/2021/09/msg00022.htmlhttps://lists.debian.org/debian-lts-announce/2022/08/msg00017.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/https://security.gentoo.org/glsa/202212-01https://security.netapp.com/advisory/ntap-20211029-0003/https://security.netapp.com/advisory/ntap-20220121-0008/https://support.apple.com/kb/HT213183https://www.debian.org/security/2022/dsa-5197