8.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
7.7 High
AI Score
Confidence
Low
6.8 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
0.053 Low
EPSS
Percentile
93.0%
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.
CPE | Name | Operator | Version |
---|---|---|---|
curl | eq | curl-7_65_1 | |
curl | eq | curl-7_6_1-pre2 | |
curl | eq | curl-7_20_0 | |
curl | eq | curl-7_18_2 | |
curl | eq | 7.73.0-r0 | |
curl | eq | curl-7_75_0 | |
curl | eq | 7.70.0-r0 | |
curl | eq | curl-7_19_7 | |
curl | eq | curl-7_69_0 | |
curl | eq | 7.65.3-r0 |
cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
cert-portal.siemens.com/productcert/pdf/ssa-732250.pdf
curl.se/docs/CVE-2021-22901.html
github.com/curl/curl/commit/7f4a9a9b2a49547eae24d2e19bc5c346e9026479
hackerone.com/reports/1180380
security.netapp.com/advisory/ntap-20210723-0001/
security.netapp.com/advisory/ntap-20210727-0007/
www.oracle.com//security-alerts/cpujul2021.html
www.oracle.com/security-alerts/cpuapr2022.html
www.oracle.com/security-alerts/cpujan2022.html
8.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
7.7 High
AI Score
Confidence
Low
6.8 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
0.053 Low
EPSS
Percentile
93.0%