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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
mitreCNA
---
---
CVEADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 73%
VendorProductVersion
dovecotdovecot
𝑥
< 2.3.5.2
opensuseleap
15.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
dovecot
bullseye
1:2.3.13+dfsg1-2+deb11u1
fixed
stretch
not-affected
jessie
not-affected
bullseye (security)
1:2.3.13+dfsg1-2+deb11u2
fixed
bookworm
1:2.3.19.1+dfsg1-2.1+deb12u1
fixed
bookworm (security)
1:2.3.19.1+dfsg1-2.1+deb12u1
fixed
sid
1:2.3.21.1+dfsg1-1
fixed
trixie
1:2.3.21.1+dfsg1-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
dovecot
disco
Fixed 1:2.3.4.1-1ubuntu2.1
released
cosmic
Fixed 1:2.3.2.1-1ubuntu3.3
released
bionic
not-affected
xenial
not-affected
trusty
not-affected
References
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00000.html
http://www.openwall.com/lists/oss-security/2019/04/18/3
https://dovecot.org/list/dovecot-news/2019-April/000406.html
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.html
http://www.openwall.com/lists/oss-security/2019/04/18/3
https://dovecot.org/list/dovecot-news/2019-April/000406.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QHFZ5OWRIZGIWZJ5PTNVWWZNLLNH4XYS/
https://security.gentoo.org/glsa/201908-29