Vulnerability Description
An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1. Net::IMAP does not raise an exception when StartTLS fails with an an unknown response, which might allow man-in-the-middle attackers to bypass the TLS protections by leveraging a network position between the client and the registry to block the StartTLS command, aka a "StartTLS stripping attack."
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ruby-Lang | Ruby | >= 2.6.0, <= 2.6.7 |
| Oracle | Jd Edwards Enterpriseone Tools | < 9.2.6.1 |
Related Weaknesses (CWE)
References
- https://github.com/ruby/ruby/commit/a21a3b7d23704a01d34bd79d09dc37897e00922aPatchThird Party Advisory
- https://hackerone.com/reports/1178562ExploitPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00009.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/04/msg00033.html
- https://security.gentoo.org/glsa/202401-27
- https://security.netapp.com/advisory/ntap-20210902-0004/Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatchThird Party Advisory
- https://www.ruby-lang.org/en/news/2021/07/07/starttls-stripping-in-net-imap/Vendor Advisory
- https://github.com/ruby/ruby/commit/a21a3b7d23704a01d34bd79d09dc37897e00922aPatchThird Party Advisory
- https://hackerone.com/reports/1178562ExploitPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00009.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/04/msg00033.html
- https://security.gentoo.org/glsa/202401-27
- https://security.netapp.com/advisory/ntap-20210902-0004/Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatchThird Party Advisory
FAQ
What is CVE-2021-32066?
CVE-2021-32066 is a vulnerability with a CVSS score of 7.4 (HIGH). An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1. Net::IMAP does not raise an exception when StartTLS fails with an an unknown response, which might allow man-...
How severe is CVE-2021-32066?
CVE-2021-32066 has been rated HIGH with a CVSS base score of 7.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-32066?
Check the references section above for vendor advisories and patch information. Affected products include: Ruby-Lang Ruby, Oracle Jd Edwards Enterpriseone Tools.