CVE-2021-32920
HIGHCVSS 7.5/10EPSS 2.26%
Last modified
CVE-2021-32920 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Prosody before 0.11.9 allows Uncontrolled CPU Consumption via a flood of SSL/TLS renegotiation requests.. EPSS estimates a 2.26% chance of exploitation in the next 30 days.
Description
Prosody before 0.11.9 allows Uncontrolled CPU Consumption via a flood of SSL/TLS renegotiation requests.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Prosody | Prosody | < 0.11.9 |
| Debian | Debian Linux | 10.0 |
| Fedoraproject | Fedora | 32 |
| Fedoraproject | Fedora | 33 |
| Fedoraproject | Fedora | 34 |
References
- http://www.openwall.com/lists/oss-security/2021/05/13/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/05/14/2Mailing List, Mitigation, Third Party Advisory
- https://blog.prosody.im/prosody-0.11.9-released/Release Notes, Vendor Advisory
- https://security.gentoo.org/glsa/202105-15Third Party Advisory
- https://www.debian.org/security/2021/dsa-4916Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/05/13/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/05/14/2Mailing List, Mitigation, Third Party Advisory
- https://blog.prosody.im/prosody-0.11.9-released/Release Notes, Vendor Advisory
- https://security.gentoo.org/glsa/202105-15Third Party Advisory
- https://www.debian.org/security/2021/dsa-4916Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-32920?
Prosody before 0.11.9 allows Uncontrolled CPU Consumption via a flood of SSL/TLS renegotiation requests.
How severe is CVE-2021-32920?
CVE-2021-32920 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.26% probability of exploitation in the next 30 days.
How do I fix CVE-2021-32920?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-32913Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultID…
- CVE-2021-32914Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultID…
- CVE-2021-32915Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultID…
- CVE-2021-32917An issue was discovered in Prosody before 0.11.9. The proxy6…5.3
- CVE-2021-32918An issue was discovered in Prosody before 0.11.9. Default se…7.5
- CVE-2021-32919An issue was discovered in Prosody before 0.11.9. The undocu…7.5
- CVE-2021-32921An issue was discovered in Prosody before 0.11.9. It does no…5.9
- CVE-2021-32923HashiCorp Vault and Vault Enterprise allowed the renewal of …7.4
- CVE-2021-32924Invision Community (aka IPS Community Suite) before 4.6.0 al…8.8
- CVE-2021-32925admin/user_import.php in Chamilo 1.11.x reads XML data witho…6.5
- CVE-2021-32926When an authenticated password change request takes place, t…7.5
- CVE-2021-32927An attacker may be able to inject client-side JavaScript cod…6.1
Are you affected by CVE-2021-32920?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST