CVE-2021-22946

Home/CVE/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 FT

CVE

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 FT

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 orCURLOPT_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.

HIGH · CVSS 7.5 EPSS 0.00063

Act now

Public exploit or PoC is available
SSVC automatable: yes - attacks can be scripted at scale
CVSS base score ≥ 7.0

Sigma rules7 YARA rules0

⬡

Weakness Classification

CWE-319Cleartext Transmission of Sensitive Information
CWE-319Cleartext Transmission of Sensitive Information
CWE-325Missing Cryptographic Step

▤

Affected Products & Versions

haxx curl>= 7.20.0 and < 7.79.0
debian linuxall versions
fedoraproject fedoraall versions
netapp cloud backupall versions
netapp clustered data ontapall versions
netapp oncommand insightall versions
netapp oncommand workflow automationall versions
netapp snapcenterall versions
Show all 32 affected productsnetapp h300s firmwareall versions
netapp h500s firmwareall versions
netapp h700s firmwareall versions
netapp h300e firmwareall versions
netapp h500e firmwareall versions
netapp h700e firmwareall versions
netapp h410s firmwareall versions
netapp solidfire baseboard management controller firmwareall versions
oracle communications cloud native core binding support functionall versions
oracle communications cloud native core network function cloud native environmentall versions
oracle communications cloud native core network repository functionall versions
oracle communications cloud native core network slice selection functionall versions
oracle communications cloud native core service communication proxyall versions
oracle mysql server>= 5.7.0 and <= 5.7.35
oracle mysql server>= 8.0.0 and <= 8.0.26
oracle peoplesoft enterprise peopletoolsall versions
apple macos< 12.3
siemens sinec infrastructure network services< 1.0.1.1
oracle commerce guided searchall versions
oracle communications cloud native core consoleall versions
oracle communications cloud native core security edge protection proxyall versions
splunk universal forwarder>= 8.2.0 and < 8.2.12
splunk universal forwarder>= 9.0.0 and < 9.0.6
splunk universal forwarderall versions

⚠

Public Exploits & PoCs

pochackerone.com · 1334111hackerone.com

◈

Sigma Hunt Rules

Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.

producthighSuspicious Download and Execute Pattern via Curl/Wget

producthighSuspicious File Download From File Sharing Domain Via Curl.EXE

producthighSuspicious File Download From IP Via Curl.EXE

producthighCurl Download And Execute Combination

producthighSuspicious Curl.EXE Download

productmediumSuspicious Curl File Upload - Linux

Show all 7 top matches

productmediumSuspicious Curl Change User Agents - Linux

▣

Scoring & Timeline

7.5

HIGH · CVSS v3.1 · support@hackerone.com

View on NVD

Attack Vector

Network Adjacent Local Physical

Attack Complexity

Low High

Privileges Required

None Low High

User Interaction

None Required

Scope

Unchanged Changed

Confidentiality

None Low High

Integrity

None Low High

Availability

None Low High

Published to NVD29 Sep 2021 · 08:15 PM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC triage · cisa-vulnrichment

Exploitation

poc

Automatable

yes

Technical impact

partial

SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.

⚑

Vendor Advisories

suse-csafopenSUSE-SU-2024:10582-1
siemens-csafSSA-398330
siemens-csafSSA-146325
siemens-csafSSA-389290
suse-csafopenSUSE-SU-2021:1384-1
Show all 21 vendor advisoriessuse-csafSUSE-SU-2021:3351-1
suse-csafSUSE-SU-2021:3332-1
msrcCVE-2021-22946
suse-csafopenSUSE-SU-2021:3298-1
suse-csafSUSE-SU-2021:3297-1
suse-csafSUSE-SU-2021:3298-1
suse-csafSUSE-SU-2021:14807-1
usnUSN-5079-2
usnUSN-5079-1
rhsaRHSA-2022:0635Moderate
rhsaRHSA-2022:1354Moderate
rhsaRHSA-2021:4059Moderate
oracle-cpuoracle-cpu-MySQL-Server-8478--CVE-2021-22946
cisa-csafcisa-csaf-csaf_files-OT-white-2022-icsa-22-069-09
cisa-csafcisa-csaf-csaf_files-OT-white-2023-icsa-23-194-01
cisa-csafcisa-csaf-csaf_files-OT-white-2023-icsa-23-348-10

🔗

References & Sources

Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.

http://seclists.org/fulldisclosure/2022/Mar/29Mailing ListThird Party Advisory

https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatchThird Party Advisory

https://lists.debian.org/debian-lts-announce/2021/09/msg00022.htmlMailing ListThird Party Advisory

https://lists.debian.org/debian-lts-announce/2022/08/msg00017.htmlMailing ListThird Party Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/Mailing ListThird Party Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/Mailing ListThird Party Advisory

Show all 15 references

https://security.gentoo.org/glsa/202212-01Third Party Advisory

https://security.netapp.com/advisory/ntap-20211029-0003/Third Party Advisory

https://security.netapp.com/advisory/ntap-20220121-0008/Third Party Advisory

https://support.apple.com/kb/HT213183Release NotesThird Party Advisory

https://www.debian.org/security/2022/dsa-5197Third Party Advisory

https://www.oracle.com/security-alerts/cpuapr2022.htmlPatchThird Party Advisory

https://www.oracle.com/security-alerts/cpujan2022.htmlThird Party Advisory

https://www.oracle.com/security-alerts/cpujul2022.htmlPatchThird Party Advisory

https://www.oracle.com/security-alerts/cpuoct2021.htmlPatchThird Party Advisory

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