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.
Published: 2021-06-11
Score: 8.1 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
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Haxx Curl
Netapp Active Iq Unified Manager Cloud Backup H300e H300e Firmware H300s H300s Firmware H410s H410s Firmware H500e H500e Firmware H500s H500s Firmware H700e H700e Firmware H700s H700s Firmware Hci Compute Node Hci Compute Node Firmware Oncommand Insight Oncommand Workflow Automation Snapcenter Solidfire\, Enterprise Sds \& Hci Storage Node Solidfire \& Hci Management Node Solidfire Baseboard Management Controller Firmware
Oracle Communications Cloud Native Core Binding Support Function Communications Cloud Native Core Network Function Cloud Native Environment Communications Cloud Native Core Network Repository Function Communications Cloud Native Core Network Slice Selection Function Communications Cloud Native Core Service Communication Proxy Essbase Mysql Server
Redhat Jboss Core Services
Siemens Sinec Infrastructure Network Services
Splunk Universal Forwarder
cve-icon MITRE

Status: PUBLISHED

Assigner: hackerone

Published:

Updated: 2024-08-03T18:58:25.389Z

Reserved: 2021-01-06T00:00:00.000Z

Link: CVE-2021-22901

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-06-11T16:15:11.120

Modified: 2024-11-21T05:50:52.580

Link: CVE-2021-22901

cve-icon Redhat

Severity : Important

Publid Date: 2021-05-26T00:00:00Z

Links: CVE-2021-22901 - Bugzilla

cve-icon OpenCVE Enrichment

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Weaknesses