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CVE-2021-22946

Good to know:

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Date: September 29, 2021

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.

Severity Score

Related Resources (24)

https://nvd.nist.gov/vuln/detail/CVE-2021-22946
https://access.redhat.com/security/cve/CVE-2021-22946
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/
https://security.netapp.com/advisory/ntap-20211029-0003/
https://lists.debian.org/debian-lts-announce/2022/08/msg00017.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/
http://seclists.org/fulldisclosure/2022/Mar/29
https://security-tracker.debian.org/tracker/CVE-2021-22946
https://security.alpinelinux.org/vuln/CVE-2021-22946
https://www.oracle.com/security-alerts/cpujan2022.html
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-22946
https://hackerone.com/reports/1334111
https://security.netapp.com/advisory/ntap-20220121-0008/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/
https://support.apple.com/kb/HT213183
https://security.gentoo.org/glsa/202212-01
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
https://www.oracle.com/security-alerts/cpuapr2022.html
https://lists.debian.org/debian-lts-announce/2021/09/msg00022.html
https://www.oracle.com/security-alerts/cpujul2022.html
https://www.debian.org/security/2022/dsa-5197
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/
https://www.oracle.com/security-alerts/cpuoct2021.html
https://www.mend.io/vulnerability-database/CVE-2021-22946

Severity Score

Weakness Type (CWE)

Cleartext Transmission of Sensitive Information

CWE-319

Missing Cryptographic Step

CWE-325

Top Fix

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Upgrade Version

Upgrade to version curl-7_79_0

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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