CVE-2019-10691
UnknownEPSS 2.80%
Last modified
CVE-2019-10691 is a vulnerability of currently unknown severity. The JSON encoder in Dovecot before 2.3.5.2 allows attackers to repeatedly crash the authentication service by attempting to authenticate with an invalid UTF-8 sequence as the username.. EPSS estimates a 2.80% chance of exploitation in the next 30 days.
Description
The JSON encoder in Dovecot before 2.3.5.2 allows attackers to repeatedly crash the authentication service by attempting to authenticate with an invalid UTF-8 sequence as the username.
Metrics
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Dovecot | Dovecot | < 2.3.5.2 |
| Opensuse | Leap | 15.0 |
References
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00000.htmlMailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/04/18/3Mailing List, Third Party Advisory
- https://dovecot.org/list/dovecot-news/2019-April/000406.htmlMailing List, Vendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00000.htmlMailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/04/18/3Mailing List, Third Party Advisory
- https://dovecot.org/list/dovecot-news/2019-April/000406.htmlMailing List, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2019-10691?
The JSON encoder in Dovecot before 2.3.5.2 allows attackers to repeatedly crash the authentication service by attempting to authenticate with an invalid UTF-8 sequence as the username.
How severe is CVE-2019-10691?
Severity scoring for CVE-2019-10691 is pending analysis. The EPSS model estimates a 2.80% probability of exploitation in the next 30 days.
How do I fix CVE-2019-10691?
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-2019-10691?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST