Vulnerability CVE-2021-22901

Vulnerability Name:

CVE-2021-22901 (CCN-202563)

Assigned:

2021-05-26

Published:

2021-05-26

Updated:

2022-05-13

Summary:

curl 7.75.0 through 7.76.1 suffers from a use-after-free vulnerability resulting in already freed memory being used when a TLS 1.3 session ticket arrives over a connection. A malicious server can use this in rare unfortunate circumstances to potentially reach remote code execution in the client. When libcurl at run-time sets up support for TLS 1.3 session tickets on a connection using OpenSSL, it stores pointers to the transfer in-memory object for later retrieval when a session ticket arrives. If the connection is used by multiple transfers (like with a reused HTTP/1.1 connection or multiplexed HTTP/2 connection) that first transfer object might be freed before the new session is established on that connection and then the function will access a memory buffer that might be freed. When using that memory, libcurl might even call a function pointer in the object, making it possible for a remote code execution if the server could somehow manage to get crafted memory content into the correct place in memory.

CVSS v3 Severity:

8.1 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
7.1 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): High Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

8.8 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
7.7 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): Required
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

CVSS v2 Severity:

6.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Medium Authentication (Au): None
Impact Metrics:	Confidentiality (C): Partial Integrity (I): Partial Availibility (A): Partial

9.0 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:C/I:C/A:C)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): Complete Integrity (I): Complete Availibility (A): Complete

Vulnerability Type:

CWE-416

Vulnerability Consequences:

Gain Access

References:

Vulnerable Configuration:

Configuration 1:

cpe:/a:haxx:curl:*:*:*:*:*:*:*:* (Version >= 7.75.0 and <= 7.76.1)

Configuration 2:

cpe:/a:oracle:mysql_server:*:*:*:*:*:*:*:* (Version >= 8.0.0 and <= 8.0.25)

OR cpe:/a:oracle:essbase:*:*:*:*:*:*:*:* (Version >= 21.0 and < 21.3)

OR cpe:/a:oracle:essbase:*:*:*:*:*:*:*:* (Version < 11.1.2.4.047)

OR cpe:/a:oracle:mysql_server:*:*:*:*:*:*:*:* (Version <= 5.7.34)

OR cpe:/a:oracle:communications_cloud_native_core_network_slice_selection_function:1.8.0:*:*:*:*:*:*:*

OR cpe:/a:oracle:communications_cloud_native_core_network_repository_function:1.15.0:*:*:*:*:*:*:*

OR cpe:/a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:*

OR cpe:/a:oracle:communications_cloud_native_core_service_communication_proxy:1.15.0:*:*:*:*:*:*:*

OR cpe:/a:oracle:communications_cloud_native_core_network_repository_function:1.15.1:*:*:*:*:*:*:*

OR cpe:/a:oracle:communications_cloud_native_core_binding_support_function:1.11.0:*:*:*:*:*:*:*

Configuration 3:

cpe:/a:netapp:cloud_backup:-:*:*:*:*:*:*:*

OR cpe:/a:netapp:snapcenter:-:*:*:*:*:*:*:*

OR cpe:/a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*

OR cpe:/a:netapp:oncommand_insight:-:*:*:*:*:*:*:*

OR cpe:/a:netapp:solidfire_&_hci_management_node:-:*:*:*:*:*:*:*

OR cpe:/a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:*

OR cpe:/o:netapp:solidfire_baseboard_management_controller_firmware:-:*:*:*:*:*:*:*

OR cpe:/a:netapp:solidfire,_enterprise_sds_&_hci_storage_node:-:*:*:*:*:*:*:*

OR cpe:/a:netapp:active_iq_unified_manager:-:*:*:*:*:vsphere:*:*

Configuration 4:

cpe:/o:netapp:hci_compute_node_firmware:-:*:*:*:*:*:*:*

AND

cpe:/h:netapp:hci_compute_node:-:*:*:*:*:*:*:*

Configuration 5:

cpe:/o:netapp:h300e_firmware:-:*:*:*:*:*:*:*

AND

cpe:/h:netapp:h300e:-:*:*:*:*:*:*:*

Configuration 6:

cpe:/o:netapp:h300s_firmware:-:*:*:*:*:*:*:*

AND

cpe:/h:netapp:h300s:-:*:*:*:*:*:*:*

Configuration 7:

cpe:/o:netapp:h410s_firmware:-:*:*:*:*:*:*:*

AND

cpe:/h:netapp:h410s:-:*:*:*:*:*:*:*

Configuration 8:

cpe:/o:netapp:h500e_firmware:-:*:*:*:*:*:*:*

AND

cpe:/h:netapp:h500e:-:*:*:*:*:*:*:*

Configuration 9:

cpe:/o:netapp:h500s_firmware:-:*:*:*:*:*:*:*

AND

cpe:/h:netapp:h500s:-:*:*:*:*:*:*:*

Configuration 10:

cpe:/o:netapp:h700e_firmware:-:*:*:*:*:*:*:*

AND

cpe:/h:netapp:h700e:-:*:*:*:*:*:*:*

Configuration 11:

cpe:/o:netapp:h700s_firmware:-:*:*:*:*:*:*:*

AND

cpe:/h:netapp:h700s:-:*:*:*:*:*:*:*

Configuration 12:

cpe:/a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:* (Version < 1.0.1.1)

Configuration CCN 1:

cpe:/a:oracle:http_server:12.2.1.3.0:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:org.opensuse.security:def:7476	P	curl-8.0.1-150400.5.23.1 on GA media (Moderate)	2023-06-12
oval:org.opensuse.security:def:2902	P	curl-7.79.1-150400.3.1 on GA media (Moderate)	2022-06-22
oval:org.opensuse.security:def:94532	P	curl-7.79.1-150400.3.1 on GA media (Moderate)	2022-06-22
oval:org.opensuse.security:def:112133	P	curl-7.79.1-1.1 on GA media (Moderate)	2022-01-17
oval:org.opensuse.security:def:105669	P	Security update for python-Pygments (Important)	2021-12-01

BACK