Cleartext transmission of sensitive information in https://github.com/curl/curl
Priority HIGH 72CWE-325Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Partial Red Hat: 5 fixed, 4 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-319.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.04539 91st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 3 advisoriesRed Hat: 5 fixed, 4 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | https://github.com/curl/curl | curl 7.20.0 to and including 7.78.0 | — | No fix listed | CNA |
- https://github.com/curl/curl Vendor— Affected curl 7.20.0 to and including 7.78.0 Fixed in — No fix listed CNA
CPE configurations NVD · 47
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:* | 7.20.0 to before 7.79.0 | Vulnerable | Haxx |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* | 11.0 | Vulnerable | Debian |
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 33 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* | 35 | Vulnerable | Fedoraproject |
| cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
- cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:* Versions 7.20.0 to before 7.79.0 Vulnerable ·Haxx
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Versions 35 Vulnerable ·Fedoraproject
- cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
Show 37 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h300e_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h300e:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h500e_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h500e:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h700e_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h700e:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:solidfire_baseboard_management_controller_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:solidfire_baseboard_management_controller:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:1.11.0:*:*:*:*:*:*:* | 1.11.0 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:* | 1.10.0 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.0:*:*:*:*:*:*:* | 1.15.0 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.1:*:*:*:*:*:*:* | 1.15.1 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:communications_cloud_native_core_network_slice_selection_function:1.8.0:*:*:*:*:*:*:* | 1.8.0 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:communications_cloud_native_core_service_communication_proxy:1.15.0:*:*:*:*:*:*:* | 1.15.0 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:* | 5.7.0 – 5.7.35; 8.0.0 – 8.0.26 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.57:*:*:*:*:*:*:* | 8.57 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.58:*:*:*:*:*:*:* | 8.58 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.59:*:*:*:*:*:*:* | 8.59 | Vulnerable | Oracle |
| cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* | before 12.3 | Vulnerable | Apple |
| cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:* | before 1.0.1.1 | Vulnerable | Siemens |
| cpe:2.3:a:oracle:commerce_guided_search:11.3.2:*:*:*:*:*:*:* | 11.3.2 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:22.1.3:*:*:*:*:*:*:* | 22.1.3 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:communications_cloud_native_core_console:22.2.0:*:*:*:*:*:*:* | 22.2.0 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:22.1.0:*:*:*:*:*:*:* | 22.1.0 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:22.2.0:*:*:*:*:*:*:* | 22.2.0 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:communications_cloud_native_core_security_edge_protection_proxy:22.1.1:*:*:*:*:*:*:* | 22.1.1 | Vulnerable | Oracle |
| cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:* | 8.2.0 to before 8.2.12; 9.0.0 to before 9.0.6 | Vulnerable | Splunk |
| cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:* | 9.1.0 | Vulnerable | Splunk |
- cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h300e_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h300e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h500e_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h500e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h700e_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h700e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:solidfire_baseboard_management_controller_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:solidfire_baseboard_management_controller:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:1.11.0:*:*:*:*:*:*:* Versions 1.11.0 Vulnerable ·Oracle
- cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:* Versions 1.10.0 Vulnerable ·Oracle
- cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.0:*:*:*:*:*:*:* Versions 1.15.0 Vulnerable ·Oracle
- cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.1:*:*:*:*:*:*:* Versions 1.15.1 Vulnerable ·Oracle
- cpe:2.3:a:oracle:communications_cloud_native_core_network_slice_selection_function:1.8.0:*:*:*:*:*:*:* Versions 1.8.0 Vulnerable ·Oracle
- cpe:2.3:a:oracle:communications_cloud_native_core_service_communication_proxy:1.15.0:*:*:*:*:*:*:* Versions 1.15.0 Vulnerable ·Oracle
- cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:* Versions 5.7.0 – 5.7.35; 8.0.0 – 8.0.26 Vulnerable ·Oracle
- cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.57:*:*:*:*:*:*:* Versions 8.57 Vulnerable ·Oracle
- cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.58:*:*:*:*:*:*:* Versions 8.58 Vulnerable ·Oracle
- cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.59:*:*:*:*:*:*:* Versions 8.59 Vulnerable ·Oracle
- cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions before 12.3 Vulnerable ·Apple
- cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:* Versions before 1.0.1.1 Vulnerable ·Siemens
- cpe:2.3:a:oracle:commerce_guided_search:11.3.2:*:*:*:*:*:*:* Versions 11.3.2 Vulnerable ·Oracle
- cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:22.1.3:*:*:*:*:*:*:* Versions 22.1.3 Vulnerable ·Oracle
- cpe:2.3:a:oracle:communications_cloud_native_core_console:22.2.0:*:*:*:*:*:*:* Versions 22.2.0 Vulnerable ·Oracle
- cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:22.1.0:*:*:*:*:*:*:* Versions 22.1.0 Vulnerable ·Oracle
- cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:22.2.0:*:*:*:*:*:*:* Versions 22.2.0 Vulnerable ·Oracle
- cpe:2.3:a:oracle:communications_cloud_native_core_security_edge_protection_proxy:22.1.1:*:*:*:*:*:*:* Versions 22.1.1 Vulnerable ·Oracle
- cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:* Versions 8.2.0 to before 8.2.12; 9.0.0 to before 9.0.6 Vulnerable ·Splunk
- cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:* Versions 9.1.0 Vulnerable ·Splunk
Remediation
Red Hat 3 advisories
- RHSA-2022:1354 Released 2022-04-13 · Red Hat rating Moderaterh-dotnet31-curl security update
- .NET Core on Red Hat Enterprise Linux ComputeNode (v. 7) rh-dotnet31-curl-7.61.1-22.el7_9, rh-dotnet31-libcurl-7.61.1-22.el7_9, rh-dotnet31-libcurl-devel-7.61.1-22.el7_9
- .NET Core on Red Hat Enterprise Linux Server (v. 7) rh-dotnet31-curl-7.61.1-22.el7_9, rh-dotnet31-libcurl-7.61.1-22.el7_9, rh-dotnet31-libcurl-devel-7.61.1-22.el7_9
- .NET Core on Red Hat Enterprise Linux Workstation (v. 7) rh-dotnet31-curl-7.61.1-22.el7_9, rh-dotnet31-libcurl-7.61.1-22.el7_9, rh-dotnet31-libcurl-devel-7.61.1-22.el7_9
- RHSA-2022:0635 Released 2022-02-22 · Red Hat rating Moderatecurl security update
- Red Hat Enterprise Linux BaseOS EUS (v. 8.2) curl-7.61.1-12.el8_2.4, libcurl-7.61.1-12.el8_2.4, libcurl-devel-7.61.1-12.el8_2.4 +1
- RHSA-2021:4059 Released 2021-11-02 · Red Hat rating Moderatecurl security update
- Red Hat Enterprise Linux BaseOS (v. 8) curl-7.61.1-18.el8_4.2, libcurl-7.61.1-18.el8_4.2, libcurl-devel-7.61.1-18.el8_4.2 +1
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
https://github.com/curl/curl — FEDORA-2021-1d24845e93
3 records Highest priority Priority HIGH 1 HIGH, 2 MEDIUM
Other records, highest priority first
- TI-2021-05808 Cryptographic flaw in https://github.com/curl/curlPriority MEDIUM 60
- TI-2021-05806 Double free in https://github.com/curl/curlPriority MEDIUM 55
- Advisory ·
https://github.com/curl/curl — FEDORA-2021-fc96a3a749
3 records Highest priority Priority HIGH 1 HIGH, 2 MEDIUM
Other records, highest priority first
- TI-2021-05808 Cryptographic flaw in https://github.com/curl/curlPriority MEDIUM 60
- TI-2021-05806 Double free in https://github.com/curl/curlPriority MEDIUM 55
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| .NET Core 2.1 on Red Hat Enterprise Linux | Affected | No fix planned: Out of support scope |
| Red Hat Ceph Storage 2 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix yet |
| Red Hat Software Collections | Affected | No fix yet |
| .NET Core on Red Hat Enterprise Linux ComputeNode (v. 7) | Fixed | RHSA-2022:1354 |
| .NET Core on Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2022:1354 |
| .NET Core on Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2022:1354 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2021:4059 |
| Red Hat Enterprise Linux BaseOS EUS (v. 8.2) | Fixed | RHSA-2022:0635 |
Not affected: 3 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 9
- Red Hat JBoss Core Services
Timeline
- 2026-10-02 Threatist record created from CVE-2021-22946
- 2026-10-03 Alias added: GHSA-3cmq-42w4-c529
References
Patch 4
Advisory 11
- [debian-lts-announce] 20210930 [SECURITY] [DLA 2773-1] curl security update
- FEDORA-2021-fc96a3a749
- FEDORA-2021-1d24845e93
- 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 12.3
- https://support.apple.com/kb/HT213183
- DSA-5197
- [debian-lts-announce] 20220828 [SECURITY] [DLA 3085-1] curl security update
- GLSA-202212-01
Sources
- CVE-2021-22946 · CVE Program
- CVE-2021-22946 · NVD
- FIRST EPSS
- GHSA-3cmq-42w4-c529 · GitHub Advisory Database · CC BY 4.0
- CVE-2021-22946 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences