VulnerabilityModified
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.
HIGH 7.5EPSS 2.80%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.80%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 2.80% probability · 86th percentile
- CISA KEV
- Not listed
- Affected
- dovecot/dovecot · opensuse/leap
- Source
- cve@mitre.org
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
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QHFZ5OWRIZGIWZJ5PTNVWWZNLLNH4XYS/
- https://security.gentoo.org/glsa/201908-29
- 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
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QHFZ5OWRIZGIWZJ5PTNVWWZNLLNH4XYS/
- https://security.gentoo.org/glsa/201908-29
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.