Vulnerability Details CVE-2021-22890
curl 7.63.0 to and including 7.75.0 includes vulnerability that allows a malicious HTTPS proxy to MITM a connection due to bad handling of TLS 1.3 session tickets. When using a HTTPS proxy and TLS 1.3, libcurl can confuse session tickets arriving from the HTTPS proxy but work as if they arrived from the remote server and then wrongly "short-cut" the host handshake. When confusing the tickets, a HTTPS proxy can trick libcurl to use the wrong session ticket resume for the host and thereby circumvent the server TLS certificate check and make a MITM attack to be possible to perform unnoticed. Note that such a malicious HTTPS proxy needs to provide a certificate that curl will accept for the MITMed server for an attack to work - unless curl has been told to ignore the server certificate check.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 26.4%
CVSS Severity
CVSS v3 Score 3.7
CVSS v2 Score 4.3
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
- https://curl.se/docs/CVE-2021-22890.html
- https://hackerone.com/reports/1129529
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2ZC5BMIOKLBQJSFCHEDN2G2C2SH274BP/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITVWPVGLFISU5BJC2BXBRYSDXTXE2YGC/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KQUIOYX2KUU6FIUZVB5WWZ6JHSSYSQWJ/
- https://security.gentoo.org/glsa/202105-36
- https://security.netapp.com/advisory/ntap-20210521-0007/
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
- https://curl.se/docs/CVE-2021-22890.html
- https://hackerone.com/reports/1129529
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2ZC5BMIOKLBQJSFCHEDN2G2C2SH274BP/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITVWPVGLFISU5BJC2BXBRYSDXTXE2YGC/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KQUIOYX2KUU6FIUZVB5WWZ6JHSSYSQWJ/
- https://security.gentoo.org/glsa/202105-36
- https://security.netapp.com/advisory/ntap-20210521-0007/
- https://www.oracle.com//security-alerts/cpujul2021.html
Products affected by CVE-2021-22890
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cpe:2.3:a:haxx:libcurl:7.63.0
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cpe:2.3:a:haxx:libcurl:7.64.0
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cpe:2.3:a:haxx:libcurl:7.64.1
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cpe:2.3:a:haxx:libcurl:7.65.0
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cpe:2.3:a:haxx:libcurl:7.65.1
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cpe:2.3:a:haxx:libcurl:7.65.2
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cpe:2.3:a:haxx:libcurl:7.65.3
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cpe:2.3:a:haxx:libcurl:7.66.0
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cpe:2.3:a:haxx:libcurl:7.67.0
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cpe:2.3:a:haxx:libcurl:7.68.0
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cpe:2.3:a:haxx:libcurl:7.69.0
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cpe:2.3:a:haxx:libcurl:7.69.1
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cpe:2.3:a:haxx:libcurl:7.70.0
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cpe:2.3:a:haxx:libcurl:7.71.0
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cpe:2.3:a:haxx:libcurl:7.71.1
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cpe:2.3:a:haxx:libcurl:7.72.0
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cpe:2.3:a:haxx:libcurl:7.73.0
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cpe:2.3:a:haxx:libcurl:7.74.0
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cpe:2.3:a:haxx:libcurl:7.75.0
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cpe:2.3:a:netapp:hci_management_node:-
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cpe:2.3:a:netapp:solidfire:-
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cpe:2.3:a:oracle:communications_billing_and_revenue_management:12.0.0.3.0
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cpe:2.3:a:oracle:essbase:21.2
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cpe:2.3:a:siemens:sinec_infrastructure_network_services:-
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cpe:2.3:a:siemens:sinec_infrastructure_network_services:1.0.1
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cpe:2.3:a:splunk:universal_forwarder:8.2.0
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cpe:2.3:a:splunk:universal_forwarder:8.2.10
-
cpe:2.3:a:splunk:universal_forwarder:8.2.11
-
cpe:2.3:a:splunk:universal_forwarder:8.2.6
-
cpe:2.3:a:splunk:universal_forwarder:8.2.7
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cpe:2.3:a:splunk:universal_forwarder:8.2.8
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cpe:2.3:a:splunk:universal_forwarder:8.2.9
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cpe:2.3:a:splunk:universal_forwarder:9.0.0
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cpe:2.3:a:splunk:universal_forwarder:9.0.1
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cpe:2.3:a:splunk:universal_forwarder:9.0.2
-
cpe:2.3:a:splunk:universal_forwarder:9.0.3
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cpe:2.3:a:splunk:universal_forwarder:9.0.4
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cpe:2.3:a:splunk:universal_forwarder:9.0.5
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cpe:2.3:a:splunk:universal_forwarder:9.1.0
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cpe:2.3:h:netapp:hci_storage_node:-
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cpe:2.3:o:broadcom:fabric_operating_system:-
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cpe:2.3:o:debian:debian_linux:9.0
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cpe:2.3:o:fedoraproject:fedora:32
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cpe:2.3:o:fedoraproject:fedora:33
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cpe:2.3:o:fedoraproject:fedora:34