Description
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.
CVSS breakdown
Affected products
- Broadcom / fabric_operating_system
- Debian / debian_linux9.0 – 9.0
- fedoraproject / fedora32 – 32
- fedoraproject / fedora33 – 33
- fedoraproject / fedora34 – 34
- haxx / libcurl7.63.0 – 7.75.0
- NetApp / hci_management_node
- NetApp / hci_storage_node
- NetApp / solidfire
- oracle / communications_billing_and_revenue_management12.0.0.3.0 – 12.0.0.3.0
- oracle / essbase21.2 – 21.2
- Siemens / sinec_infrastructure_network_services1.0.1.1
- Splunk / Universal Forwarder8.2.0 – 8.2.12
- Splunk / Universal Forwarder9.1.0 – 9.1.0
References
- MISChttps://hackerone.com/reports/1129529
- MISChttps://curl.se/docs/CVE-2021-22890.html
- MAILING_LISThttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITVWPVGLFISU5BJC2BXBRYSDXTXE2YGC/
- MAILING_LISThttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KQUIOYX2KUU6FIUZVB5WWZ6JHSSYSQWJ/
- MAILING_LISThttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2ZC5BMIOKLBQJSFCHEDN2G2C2SH274BP/
- MISChttps://security.gentoo.org/glsa/202105-36
- VENDOR_ADVISORYhttps://www.oracle.com//security-alerts/cpujul2021.html
- MISChttps://security.netapp.com/advisory/ntap-20210521-0007/
- MISChttps://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf