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TI-2021-05786 Aliases CVE-2021-22925GHSA-rjqf-6h27-xqfp

Information disclosure in https://github.com/curl/curl

Priority MEDIUM 63CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Partial Red Hat: 1 fixed, 7 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-200.

Summary

curl supports the `-t` command line option, known as `CURLOPT_TELNETOPTIONS`in libcurl. This rarely used option is used to send variable=content pairs toTELNET servers.Due to flaw in the option parser for sending `NEW_ENV` variables, libcurlcould be made to pass on uninitialized data from a stack based buffer to theserver. Therefore potentially revealing sensitive internal information to theserver using a clear-text network protocol.This could happen because curl did not call and use sscanf() correctly whenparsing the string provided by the application.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.05367 92nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 1 advisoryRed Hat: 1 fixed, 7 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

VendorProductAffected versionsFixed inStatusSource
—https://github.com/curl/curlcurl 7.7 to and including 7.77.0—No fix listedCNA
  • https://github.com/curl/curl Vendor— Affected curl 7.7 to and including 7.77.0 Fixed in — No fix listed CNA

CPE configurations NVD · 43

CPEVersionsRoleVendor
cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*7.7 to before 7.78.0VulnerableHaxx
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*33VulnerableFedoraproject
cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:o:apple:mac_os_x:10.15.7:-:*:*:*:*:*:*10.15.7VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-001:*:*:*:*:*:*10.15.7 security_update_2021-001VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-002:*:*:*:*:*:*10.15.7 security_update_2021-002VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-003:*:*:*:*:*:*10.15.7 security_update_2021-003VulnerableApple
  • cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:* Versions 7.7 to before 7.78.0 Vulnerable ·Haxx
  • cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 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:hci_management_node:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:o:apple:mac_os_x:10.15.7:-:*:*:*:*:*:* Versions 10.15.7 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-001:*:*:*:*:*:* Versions 10.15.7 security_update_2021-001 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-002:*:*:*:*:*:* Versions 10.15.7 security_update_2021-002 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-003:*:*:*:*:*:* Versions 10.15.7 security_update_2021-003 Vulnerable ·Apple
Show 33 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-004:*:*:*:*:*:*10.15.7 security_update_2021-004VulnerableApple
cpe:2.3:o:apple:macos:11.0:*:*:*:*:*:*:*11.0VulnerableApple
cpe:2.3:o:apple:macos:11.0.1:*:*:*:*:*:*:*11.0.1VulnerableApple
cpe:2.3:o:apple:macos:11.1:*:*:*:*:*:*:*11.1VulnerableApple
cpe:2.3:o:apple:macos:11.1.0:*:*:*:*:*:*:*11.1.0VulnerableApple
cpe:2.3:o:apple:macos:11.2:*:*:*:*:*:*:*11.2VulnerableApple
cpe:2.3:o:apple:macos:11.2.1:*:*:*:*:*:*:*11.2.1VulnerableApple
cpe:2.3:o:apple:macos:11.3:*:*:*:*:*:*:*11.3VulnerableApple
cpe:2.3:o:apple:macos:11.3.1:*:*:*:*:*:*:*11.3.1VulnerableApple
cpe:2.3:o:apple:macos:11.4:*:*:*:*:*:*:*11.4VulnerableApple
cpe:2.3:o:apple:macos:11.5:*:*:*:*:*:*:*11.5VulnerableApple
cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*5.7.0 – 5.7.35; 8.0.0 – 8.0.26VulnerableOracle
cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.57:*:*:*:*:*:*:*8.57VulnerableOracle
cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.58:*:*:*:*:*:*:*8.58VulnerableOracle
cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.59:*:*:*:*:*:*:*8.59VulnerableOracle
cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:*before 1.0.1.1VulnerableSiemens
cpe:2.3:a:siemens:sinema_remote_connect_server:*:*:*:*:*:*:*:*before 3.1VulnerableSiemens
cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:*not specified by NVDRunning onNetApp
cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:*not specified by NVDRunning onNetApp
cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:*not specified by NVDRunning onNetApp
cpe:2.3:o:netapp:h300e_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:h:netapp:h300e:-:*:*:*:*:*:*:*not specified by NVDRunning onNetApp
cpe:2.3:o:netapp:h500e_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:h:netapp:h500e:-:*:*:*:*:*:*:*not specified by NVDRunning onNetApp
cpe:2.3:o:netapp:h700e_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:h:netapp:h700e:-:*:*:*:*:*:*:*not specified by NVDRunning onNetApp
cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:*not specified by NVDRunning onNetApp
cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:*8.2.0 to before 8.2.12; 9.0.0 to before 9.0.6VulnerableSplunk
cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:*9.1.0VulnerableSplunk
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-004:*:*:*:*:*:* Versions 10.15.7 security_update_2021-004 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:11.0.1:*:*:*:*:*:*:* Versions 11.0.1 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:11.1:*:*:*:*:*:*:* Versions 11.1 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:11.1.0:*:*:*:*:*:*:* Versions 11.1.0 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:11.2:*:*:*:*:*:*:* Versions 11.2 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:11.2.1:*:*:*:*:*:*:* Versions 11.2.1 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:11.3:*:*:*:*:*:*:* Versions 11.3 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:11.3.1:*:*:*:*:*:*:* Versions 11.3.1 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:11.4:*:*:*:*:*:*:* Versions 11.4 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:11.5:*:*:*:*:*:*:* Versions 11.5 Vulnerable ·Apple
  • 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:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:* Versions before 1.0.1.1 Vulnerable ·Siemens
  • cpe:2.3:a:siemens:sinema_remote_connect_server:*:*:*:*:*:*:*:* Versions before 3.1 Vulnerable ·Siemens
  • 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: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 1 advisory

  • RHSA-2021:4511 Released 2021-11-09 · Red Hat rating Moderate
    curl security and bug fix update
    • Red Hat Enterprise Linux BaseOS (v. 8) curl-7.61.1-22.el8, libcurl-7.61.1-22.el8, libcurl-devel-7.61.1-22.el8 +1

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
.NET Core 2.1 on Red Hat Enterprise LinuxAffectedNo fix planned: Will not fix
.NET Core 3.1 on Red Hat Enterprise LinuxAffectedNo fix planned: Will not fix
Red Hat Ceph Storage 2AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat JBoss Core ServicesAffectedNo fix yet
Red Hat Software CollectionsAffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2021:4511
Not affected: 1 product
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-22925
  2. 2026-10-03 Alias added: GHSA-rjqf-6h27-xqfp

References

Exploit 1

Patch 3

Advisory 8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences