Vulnerability in Broadcom Fabric Operating System
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.
EPSS: 0.031 (86.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Broadcom Fabric_operating_system
- Haxx Libcurl
- Netapp Hci_management_node
- Netapp Hci_storage_node
- Netapp Solidfire
- Oracle Communications_billing_and_revenue_management — versions 12.0.0.3.0
- Oracle Essbase — versions 21.2
- Siemens Sinec_infrastructure_network_services
- Splunk Universal_forwarder — versions 9.1.0
- Debian Debian_linux — versions 9.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- support@hackerone.com (Exploit, Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
- support@hackerone.com (Patch, x_refsource_MISC, Vendor Advisory)
- support@hackerone.com (x_refsource_FEDORA, vendor-advisory, Mailing List, Third Party Advisory)
- support@hackerone.com (x_refsource_FEDORA, vendor-advisory, Mailing List, Third Party Advisory)
- support@hackerone.com (x_refsource_FEDORA, vendor-advisory, Mailing List, Third Party Advisory)
- support@hackerone.com (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
- support@hackerone.com (Third Party Advisory, x_refsource_MISC)
- support@hackerone.com (x_refsource_CONFIRM, Third Party Advisory)
- support@hackerone.com (x_refsource_CONFIRM, Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-22890?
- CVE-2021-22890 is a low-severity vulnerability in Broadcom Fabric Operating System, classified under Channel Accessible by Non-Endpoint. CVSS score: 3.7/10. Published 2021-04-01.
- How severe is CVE-2021-22890?
- Low severity. CVSS v3 base score is 3.7 out of 10.
- Is CVE-2021-22890 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.