Description
In Dovecot before 2.3.11.3, sending a specially formatted NTLM request will crash the auth service because of an out-of-bounds read.
References (12)
Core 12
Core References
Exploit, Mailing List, Third Party Advisory x_refsource_confirm
https://www.openwall.com/lists/oss-security/2020/08/12/2
Third Party Advisory vendor-advisory
x_refsource_debian
https://www.debian.org/security/2020/dsa-4745
Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2020/08/msg00024.html
Third Party Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/4456-1/
Third Party Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/4456-2/
Broken Link vendor-advisory
x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00048.html
Broken Link vendor-advisory
x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00059.html
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4AAX2MJEULPVSRZOBX3PNPFSYP4FM4TT/
Third Party Advisory vendor-advisory
x_refsource_gentoo
https://security.gentoo.org/glsa/202009-02
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XKKAL3OMG76ZZ7CIEMQP2K6KCTD2RAKE/
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EYZU6CHA3VMYYAUCMHSCCQKJEVEIKPQ2/
Vendor Advisory x_refsource_misc
https://dovecot.org/security
Scores
CVSS v3
7.5
EPSS
0.0563
EPSS Percentile
90.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-125
Status
published
Products (10)
canonical/ubuntu_linux
14.04
canonical/ubuntu_linux
16.04
canonical/ubuntu_linux
18.04
canonical/ubuntu_linux
20.04
debian/debian_linux
9.0
debian/debian_linux
10.0
dovecot/dovecot
< 2.3.11.3
fedoraproject/fedora
31
fedoraproject/fedora
32
fedoraproject/fedora
33
Published
Aug 12, 2020
Tracked Since
Feb 18, 2026