CVE-2021-33515
MEDIUMCVSS 4.8/10EPSS 2.84%
Last modified
CVE-2021-33515 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. The submission service in Dovecot before 2.3.15 allows STARTTLS command injection in lib-smtp. Sensitive information can be redirected to an attacker-controlled address.. EPSS estimates a 2.84% chance of exploitation in the next 30 days.
Description
The submission service in Dovecot before 2.3.15 allows STARTTLS command injection in lib-smtp. Sensitive information can be redirected to an attacker-controlled address.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Dovecot | Dovecot | < 2.3.14.1 |
| Fedoraproject | Fedora | 33 |
| Fedoraproject | Fedora | 34 |
| Debian | Debian Linux | 10.0 |
References
- https://dovecot.org/securityVendor Advisory
- https://lists.debian.org/debian-lts-announce/2022/09/msg00032.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202107-41Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/06/28/2Mailing List, Third Party Advisory
- https://dovecot.org/securityVendor Advisory
- https://lists.debian.org/debian-lts-announce/2022/09/msg00032.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202107-41Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/06/28/2Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-33515?
The submission service in Dovecot before 2.3.15 allows STARTTLS command injection in lib-smtp. Sensitive information can be redirected to an attacker-controlled address.
How severe is CVE-2021-33515?
CVE-2021-33515 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 2.84% probability of exploitation in the next 30 days.
How do I fix CVE-2021-33515?
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.
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Are you affected by CVE-2021-33515?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST