CVE-2021-22901

Upstream information

CVE-2021-22901 at MITRE

Description

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.

---

Upstream Security Advisories:

• https://curl.se/docs/CVE-2021-22901.html
• https://curl.se/docs/CVE-2021-22901.html

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having important severity.

CVSS v2 Scores

	National Vulnerability Database
Base Score	6.8
Vector	AV:N/AC:M/Au:N/C:P/I:P/A:P
Access Vector	Network
Access Complexity	Medium
Authentication	None
Confidentiality Impact	Partial
Integrity Impact	Partial
Availability Impact	Partial

CVSS v3 Scores

	National Vulnerability Database
Base Score	8.1
Vector	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector	Network
Attack Complexity	High
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality Impact	High
Integrity Impact	High
Availability Impact	High
CVSSv3 Version	3.1

SUSE Bugzilla entries: 1186115 [RESOLVED / FIXED], 1188549 [RESOLVED / FIXED]

No SUSE Security Announcements cross referenced.

List of released packages

Product(s)	Fixed package version(s)	References
SUSE Linux Enterprise Desktop 15 SP4 SUSE Linux Enterprise High Performance Computing 15 SP4 SUSE Linux Enterprise Module for Basesystem 15 SP4 SUSE Linux Enterprise Server 15 SP4 SUSE Linux Enterprise Server for SAP Applications 15 SP4 SUSE Manager Proxy 4.3 SUSE Manager Retail Branch Server 4.3 SUSE Manager Server 4.3	curl >= 7.79.1-150400.3.1 libcurl-devel >= 7.79.1-150400.3.1 libcurl4 >= 7.79.1-150400.3.1 libcurl4-32bit >= 7.79.1-150400.3.1	Patchnames: SUSE Linux Enterprise Module for Basesystem 15 SP4 GA curl-7.79.1-150400.3.1
SUSE Linux Enterprise Desktop 15 SP5 SUSE Linux Enterprise High Performance Computing 15 SP5 SUSE Linux Enterprise Module for Basesystem 15 SP5 SUSE Linux Enterprise Server 15 SP5 SUSE Linux Enterprise Server for SAP Applications 15 SP5	curl >= 8.0.1-150400.5.23.1 libcurl-devel >= 8.0.1-150400.5.23.1 libcurl4 >= 8.0.1-150400.5.23.1 libcurl4-32bit >= 8.0.1-150400.5.23.1	Patchnames: SUSE Linux Enterprise Module for Basesystem 15 SP5 GA curl-8.0.1-150400.5.23.1
SUSE Linux Enterprise Desktop 15 SP6 SUSE Linux Enterprise High Performance Computing 15 SP6 SUSE Linux Enterprise Module for Basesystem 15 SP6 SUSE Linux Enterprise Server 15 SP6 SUSE Linux Enterprise Server for SAP Applications 15 SP6	curl >= 8.6.0-150600.2.2 libcurl-devel >= 8.6.0-150600.2.2 libcurl4 >= 8.6.0-150600.2.2 libcurl4-32bit >= 8.6.0-150600.2.2	Patchnames: SUSE Linux Enterprise Module for Basesystem 15 SP6 GA curl-8.6.0-150600.2.2
SUSE Linux Enterprise Micro 5.3	curl >= 7.79.1-150400.5.6.1 libcurl4 >= 7.79.1-150400.5.6.1	Patchnames: SUSE Linux Enterprise Micro 5.3 GA curl-7.79.1-150400.5.6.1
SUSE Linux Enterprise Micro 5.4	curl >= 7.79.1-150400.5.15.1 libcurl4 >= 7.79.1-150400.5.15.1	Patchnames: SUSE Linux Enterprise Micro 5.4 GA curl-7.79.1-150400.5.15.1
SUSE Linux Micro 6.0	curl >= 8.6.0-1.2 libcurl4 >= 8.6.0-1.2	Patchnames: SUSE Linux Micro 6.0 GA curl-8.6.0-1.2
SUSE Linux Micro 6.1	curl >= 8.9.1-slfo.1.1_1.2 libcurl4 >= 8.9.1-slfo.1.1_1.2	Patchnames: SUSE Linux Micro 6.1 GA curl-8.9.1-slfo.1.1_1.2
openSUSE Leap 15.4	curl >= 7.79.1-150400.3.1 libcurl4 >= 7.79.1-150400.3.1 libcurl4-32bit >= 7.79.1-150400.3.1	Patchnames: openSUSE Leap 15.4 GA curl-7.79.1-150400.3.1
openSUSE Tumbleweed	curl >= 7.79.1-1.1 libcurl-devel >= 7.79.1-1.1 libcurl-devel-32bit >= 7.79.1-1.1 libcurl4 >= 7.79.1-1.1 libcurl4-32bit >= 7.79.1-1.1	Patchnames: openSUSE-Tumbleweed-2024-10582

---

First public cloud image revisions this CVE is fixed in:

• amazon/suse-sles-12-sp5-byos-v20230808-hvm-ssd-x86_64
• amazon/suse-sles-12-sp5-v20230808-ecs-hvm-ssd-x86_64
• amazon/suse-sles-12-sp5-v20230808-hvm-ssd-x86_64
• amazon/suse-sles-sap-12-sp5-byos-v20230808-hvm-ssd-x86_64
• google/sles-12-sp5-byos-v20230718-x86-64
• google/sles-12-sp5-sap-byos-v20230718-x86-64
• google/sles-12-sp5-sap-v20230718-x86-64
• google/sles-12-sp5-v20230807-x86-64
• microsoft/suse-sle-hpc-12-sp5-byos-v20230718-x86_64
• microsoft/suse-sle-hpc-12-sp5-v20230718-x86_64
• microsoft/suse-sles-12-sp5-basic-v20230718-x86_64
• microsoft/suse-sles-12-sp5-byos-v20230622-x86_64
• microsoft/suse-sles-12-sp5-v20230718-x86_64
• microsoft/suse-sles-sap-12-sp5-byos-v20230622-x86_64
• microsoft/suse-sles-sap-12-sp5-v20230718-x86_64

---

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s)	Source package	State
Products under general support and receiving all security fixes.
SLES15-SP5-CHOST-BYOS-Aliyun	curl	Already fixed
SLES15-SP5-CHOST-BYOS-Azure	curl	Already fixed
SLES15-SP5-CHOST-BYOS-EC2	curl	Already fixed
SLES15-SP5-CHOST-BYOS-GCE	curl	Already fixed
SLES15-SP5-CHOST-BYOS-SAP-CCloud	curl	Already fixed
SUSE Linux Enterprise Desktop 15 SP5	curl	Already fixed
SUSE Linux Enterprise Desktop 15 SP6	curl	Already fixed
SUSE Linux Enterprise High Performance Computing 15 SP5	curl	Already fixed
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS	curl	Already fixed
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS	curl	Already fixed
SUSE Linux Enterprise High Performance Computing 15 SP6	curl	Already fixed
SUSE Linux Enterprise Installer Updates 15 SP5	curl	Already fixed
SUSE Linux Enterprise Micro 5.1	curl	Not affected
SUSE Linux Enterprise Micro 5.2	curl	Not affected
SUSE Linux Enterprise Micro 5.3	curl	Already fixed
SUSE Linux Enterprise Micro 5.4	curl	Already fixed
SUSE Linux Enterprise Micro 5.5	curl	Already fixed
SUSE Linux Enterprise Module for Basesystem 15 SP5	curl	Already fixed
SUSE Linux Enterprise Module for Basesystem 15 SP6	curl	Already fixed
SUSE Linux Enterprise Server 15 SP5	curl	Already fixed
SUSE Linux Enterprise Server 15 SP5-LTSS	curl	Already fixed
SUSE Linux Enterprise Server 15 SP6	curl	Already fixed
SUSE Linux Enterprise Server for SAP Applications 15 SP5	curl	Already fixed
SUSE Linux Enterprise Server for SAP Applications 15 SP6	curl	Already fixed
SUSE Manager Proxy 4.3	curl	Already fixed
SUSE Manager Retail Branch Server 4.3	curl	Already fixed
SUSE Manager Server 4.3	curl	Already fixed
openSUSE Leap 15.5	curl	Already fixed
openSUSE Leap 15.6	curl	Already fixed
openSUSE Leap Micro 5.5	curl	Already fixed
Products under Long Term Service Pack support and receiving important and critical security fixes.
SLES15-EC2-CHOST-HVM-BYOS	curl	Not affected
SLES15-SP1-CHOST-BYOS-Azure	curl	Not affected
SLES15-SP1-CHOST-BYOS-EC2	curl	Not affected
SLES15-SP1-CHOST-BYOS-GCE	curl	Not affected
SLES15-SP2-CHOST-BYOS-Aliyun	curl	Not affected
SLES15-SP2-CHOST-BYOS-Azure	curl	Not affected
SLES15-SP2-CHOST-BYOS-EC2	curl	Not affected
SLES15-SP2-CHOST-BYOS-GCE	curl	Not affected
SLES15-SP3-CHOST-BYOS-Aliyun	curl	Not affected
SLES15-SP3-CHOST-BYOS-Azure	curl	Not affected
SLES15-SP3-CHOST-BYOS-EC2	curl	Not affected
SLES15-SP3-CHOST-BYOS-GCE	curl	Not affected
SLES15-SP3-CHOST-BYOS-SAP-CCloud	curl	Not affected
SLES15-SP4-CHOST-BYOS	curl	Already fixed
SLES15-SP4-CHOST-BYOS-Aliyun	curl	Already fixed
SLES15-SP4-CHOST-BYOS-Azure	curl	Already fixed
SLES15-SP4-CHOST-BYOS-EC2	curl	Already fixed
SLES15-SP4-CHOST-BYOS-GCE	curl	Already fixed
SLES15-SP4-CHOST-BYOS-SAP-CCloud	curl	Already fixed
SUSE Linux Enterprise Desktop 15 SP4	curl	Already fixed
SUSE Linux Enterprise High Performance Computing 12 SP5	curl	Not affected
SUSE Linux Enterprise High Performance Computing 15 SP2	curl	Not affected
SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS	curl	Not affected
SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS	curl	Not affected
SUSE Linux Enterprise High Performance Computing 15 SP3	curl	Not affected
SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS	curl	Not affected
SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS	curl	Not affected
SUSE Linux Enterprise High Performance Computing 15 SP4	curl	Already fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS	curl	Already fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS	curl	Already fixed
SUSE Linux Enterprise Installer Updates 15 SP4	curl	Already fixed
SUSE Linux Enterprise Module for Basesystem 15 SP2	curl	Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP3	curl	Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP4	curl	Already fixed
SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE	curl	Not affected
SUSE Linux Enterprise Server 12 SP5	curl	Not affected
SUSE Linux Enterprise Server 12 SP5-LTSS	curl	Not affected
SUSE Linux Enterprise Server 15 SP2	curl	Not affected
SUSE Linux Enterprise Server 15 SP2-LTSS	curl	Not affected
SUSE Linux Enterprise Server 15 SP3	curl	Not affected
SUSE Linux Enterprise Server 15 SP3-LTSS	curl	Not affected
SUSE Linux Enterprise Server 15 SP4	curl	Already fixed
SUSE Linux Enterprise Server 15 SP4-LTSS	curl	Already fixed
SUSE Linux Enterprise Server 15-ESPOS	curl	Not affected
SUSE Linux Enterprise Server Business Critical Linux 15 SP1	curl	Not affected
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5	curl	Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP5	curl	Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP2	curl	Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP3	curl	Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP4	curl	Already fixed
Products past their end of life and not receiving proactive updates anymore.
HPE Helion OpenStack 8	curl	Not affected
SUSE CaaS Platform 3.0	curl	Not affected
SUSE CaaS Platform 4.0	curl	Not affected
SUSE Enterprise Storage 6	curl	Not affected
SUSE Enterprise Storage 7	curl	Not affected
SUSE Enterprise Storage 7.1	curl	Not affected
SUSE Linux Enterprise Desktop 11 SP3	curl	Not affected
SUSE Linux Enterprise Desktop 11 SP4	curl	Not affected
SUSE Linux Enterprise Desktop 12	curl	Not affected
SUSE Linux Enterprise Desktop 12 SP1	curl	Not affected
SUSE Linux Enterprise Desktop 12 SP2	curl	Not affected
SUSE Linux Enterprise Desktop 12 SP3	curl	Not affected
SUSE Linux Enterprise Desktop 12 SP4	curl	Not affected
SUSE Linux Enterprise Desktop 15	curl	Not affected
SUSE Linux Enterprise Desktop 15 SP1	curl	Not affected
SUSE Linux Enterprise Desktop 15 SP2	curl	Not affected
SUSE Linux Enterprise Desktop 15 SP3	curl	Not affected
SUSE Linux Enterprise High Performance Computing 15	curl	Not affected
SUSE Linux Enterprise High Performance Computing 15 SP1	curl	Not affected
SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS	curl	Not affected
SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS	curl	Not affected
SUSE Linux Enterprise High Performance Computing 15-ESPOS	curl	Not affected
SUSE Linux Enterprise High Performance Computing 15-LTSS	curl	Not affected
SUSE Linux Enterprise Micro 5.0	curl	Not affected
SUSE Linux Enterprise Module for Basesystem 15	curl	Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP1	curl	Not affected
SUSE Linux Enterprise Point of Sale 11 SP3	curl	Not affected
SUSE Linux Enterprise Point of Sale 12 SP2-CLIENT	curl	Not affected
SUSE Linux Enterprise Point of Service 11 SP3	curl	Not affected
SUSE Linux Enterprise Real Time 15 SP2	curl	Not affected
SUSE Linux Enterprise Real Time 15 SP3	curl	Not affected
SUSE Linux Enterprise Real Time 15 SP4	curl	Already fixed
SUSE Linux Enterprise Server 11 SP3	curl	Not affected
SUSE Linux Enterprise Server 11 SP3-LTSS	curl	Not affected
SUSE Linux Enterprise Server 11 SP4	curl	Not affected
SUSE Linux Enterprise Server 11 SP4 LTSS	curl	Not affected
SUSE Linux Enterprise Server 11 SP4-LTSS	curl	Not affected
SUSE Linux Enterprise Server 12	curl	Not affected
SUSE Linux Enterprise Server 12 SP1	curl	Not affected
SUSE Linux Enterprise Server 12 SP1-LTSS	curl	Not affected
SUSE Linux Enterprise Server 12 SP2	curl	Not affected
SUSE Linux Enterprise Server 12 SP2-BCL	curl	Not affected
SUSE Linux Enterprise Server 12 SP2-ESPOS	curl	Not affected
SUSE Linux Enterprise Server 12 SP2-LTSS	curl	Not affected
SUSE Linux Enterprise Server 12 SP3	curl	Not affected
SUSE Linux Enterprise Server 12 SP3-BCL	curl	Not affected
SUSE Linux Enterprise Server 12 SP3-ESPOS	curl	Not affected
SUSE Linux Enterprise Server 12 SP3-LTSS	curl	Not affected
SUSE Linux Enterprise Server 12 SP4	curl	Not affected
SUSE Linux Enterprise Server 12 SP4-ESPOS	curl	Not affected
SUSE Linux Enterprise Server 12 SP4-LTSS	curl	Not affected
SUSE Linux Enterprise Server 12-LTSS	curl	Not affected
SUSE Linux Enterprise Server 15	curl	Not affected
SUSE Linux Enterprise Server 15 SP1	curl	Not affected
SUSE Linux Enterprise Server 15 SP1-BCL	curl	Not affected
SUSE Linux Enterprise Server 15 SP1-LTSS	curl	Not affected
SUSE Linux Enterprise Server 15 SP2-BCL	curl	Not affected
SUSE Linux Enterprise Server 15 SP3-BCL	curl	Not affected
SUSE Linux Enterprise Server 15-LTSS	curl	Not affected
SUSE Linux Enterprise Server for Raspberry Pi 12 SP2	curl	Not affected
SUSE Linux Enterprise Server for SAP Applications 11 SP3	curl	Not affected
SUSE Linux Enterprise Server for SAP Applications 11 SP4	curl	Not affected
SUSE Linux Enterprise Server for SAP Applications 12	curl	Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP1	curl	Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP2	curl	Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP3	curl	Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP4	curl	Not affected
SUSE Linux Enterprise Server for SAP Applications 15	curl	Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP1	curl	Not affected
SUSE Linux Enterprise Software Development Kit 11 SP3	curl	Not affected
SUSE Linux Enterprise Software Development Kit 11 SP4	curl	Not affected
SUSE Linux Enterprise Software Development Kit 12	curl	Not affected
SUSE Linux Enterprise Software Development Kit 12 SP1	curl	Not affected
SUSE Linux Enterprise Software Development Kit 12 SP2	curl	Not affected
SUSE Linux Enterprise Software Development Kit 12 SP3	curl	Not affected
SUSE Linux Enterprise Software Development Kit 12 SP4	curl	Not affected
SUSE Linux Enterprise Software Development Kit 12 SP5	curl	Not affected
SUSE Manager Proxy 4.0	curl	Not affected
SUSE Manager Proxy 4.1	curl	Not affected
SUSE Manager Proxy 4.2	curl	Not affected
SUSE Manager Retail Branch Server 4.0	curl	Not affected
SUSE Manager Retail Branch Server 4.1	curl	Not affected
SUSE Manager Retail Branch Server 4.2	curl	Not affected
SUSE Manager Server 4.0	curl	Not affected
SUSE Manager Server 4.1	curl	Not affected
SUSE Manager Server 4.2	curl	Not affected
SUSE OpenStack Cloud 7	curl	Not affected
SUSE OpenStack Cloud 8	curl	Not affected
SUSE OpenStack Cloud 9	curl	Not affected
SUSE OpenStack Cloud Crowbar 8	curl	Not affected
SUSE OpenStack Cloud Crowbar 9	curl	Not affected
openSUSE Leap 15.3	curl	Not affected
openSUSE Leap 15.4	curl	Already fixed
openSUSE Leap Micro 5.2	curl	Not affected
openSUSE Leap Micro 5.3	curl	Already fixed
openSUSE Leap Micro 5.4	curl	Already fixed
Products at an unknown state of their lifecycle.
SLES15-SP5-CHOST-BYOS-GDC	curl	Already fixed
Container Status
bci/gcc bci/golang bci/golang:1.20-openssl bci/golang:1.22 bci/kiwi bci/node:18 bci/nodejs bci/openjdk bci/openjdk:11 bci/openjdk:17 bci/python bci/python:3 bci/ruby bci/spack containers/python:3.11 containers/python:3.9 rancher/seedimage-builder rancher/seedimage-builder/5.3 suse/hpc/warewulf4-x86_64/sle-hpc-node suse/ltss/sle15.4/bci-base suse/manager/4.3/proxy-httpd suse/manager/4.3/proxy-salt-broker suse/manager/5.0/x86_64/proxy-httpd suse/manager/5.0/x86_64/proxy-salt-broker suse/manager/5.0/x86_64/server suse/sle-micro-rancher/5.3 suse/sle-micro-rancher/5.4 suse/sle-micro/5.3/toolbox suse/sle-micro/5.4/toolbox suse/sle-micro/base-5.5 suse/sle15:15.4 suse/sle15:15.5 suse/sle15:15.6 suse/sle15:15.7 suse/sles/15.4/libguestfs-tools:0.49.0 suse/sles/15.4/virt-handler:0.49.0 suse/sles/15.5/cdi-cloner:1.55.0 suse/sles/15.5/cdi-importer:1.55.0 suse/sles/15.5/cdi-uploadserver:1.55.0 suse/sles/15.5/libguestfs-tools:0.58.0 suse/sles/15.5/virt-handler:0.58.0 suse/sles/15.5/virt-launcher:0.58.0 suse/sles/15.6/cdi-cloner:1.58.0 suse/sles/15.6/cdi-importer:1.58.0 suse/sles/15.6/cdi-uploadserver:1.58.0 suse/sles/15.6/libguestfs-tools:1.1.1 suse/sles/15.6/virt-handler:1.1.1 suse/sles/15.6/virt-launcher:1.1.1 suse/sles/15.7/cdi-cloner:1.58.0 suse/sles/15.7/cdi-importer:1.58.0 suse/sles/15.7/cdi-uploadserver:1.58.0 suse/sles/15.7/libguestfs-tools:1.1.1 suse/sles/15.7/virt-handler:1.1.1 suse/sles/15.7/virt-launcher:1.1.1	curl	Already fixed
suse/ltss/sle15.3/bci-base suse/sle-micro-rancher/5.2 suse/sle-micro/5.1/toolbox suse/sle-micro/5.2/toolbox suse/sle15:15.3 suse/sles/15.3/libguestfs-tools:0.45.0	curl	Not affected

---

SUSE Timeline for this CVE

CVE page created: Mon May 17 10:43:12 2021
CVE page last modified: Fri Dec 20 23:28:15 2024