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CVE-2021-22901
CVE ID
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CVE-2021-22901
MITRE ATT&CK
Collection
Command and Control
Credential Access
Defense Evasion
Discovery
Execution
Exfiltration
Impact
Initial Access
Lateral Movement
Persistence
Privilege Escalation
Topic Tags
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.
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CVSS V3 Severity and Metrics
General Information
Vendors
- haxx,
- netapp,
- oracle,
- siemens,
- splunk
Products
- active iq unified manager -,
- cloud backup -,
- communications cloud native core binding support function 1.11.0,
- communications cloud native core network function cloud native environment 1.10.0,
- communications cloud native core network repository function 1.15.0,
- communications cloud native core network repository function 1.15.1,
- communications cloud native core network slice selection function 1.8.0,
- communications cloud native core service communication proxy 1.15.0,
- curl,
- essbase,
- h300e firmware -,
- h300s firmware -,
- h410s firmware -,
- h500e firmware -,
- h500s firmware -,
- h700e firmware -,
- h700s firmware -,
- hci compute node firmware -,
- mysql server,
- oncommand insight -,
- oncommand workflow automation -,
- sinec infrastructure network services,
- snapcenter -,
- solidfire & hci management node -,
- solidfire baseboard management controller firmware -,
- solidfire, enterprise sds & hci storage node -,
- universal forwarder,
- universal forwarder 9.1.0
References
Miscellaneous
Additional Info
Technical Analysis
Report as Emergent Threat Response
Report as Exploited in the Wild
CVE ID
AttackerKB requires a CVE ID in order to pull vulnerability data and references from the CVE list and the National Vulnerability Database. If available, please supply below: