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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.031 (87.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.031 · newest: 0.031 · change: 0.000
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 Linux — versions 9.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- hackerone.com/reports/1129529 (Exploit, Patch, Third Party Advisory, Issue Tracking)
- curl.se/docs/CVE-2021-22890.html (Patch, Vendor Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory, Mailing List, Third Party Advisory)
- security.gentoo.org/glsa/202105-36 (vendor-advisory, Third Party Advisory)
- www.oracle.com//security-alerts/cpujul2021.html (Third Party Advisory)
- security.netapp.com/advisory/ntap-20210521-0007/ (Third Party Advisory)
- cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf (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.