CVE-2020-12673

high-risk

Published 2020-08-12

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.

Do I need to act?

4.4% chance of exploitation in next 30 days

EPSS score — moderate exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.5/10 High

NETWORK / LOW complexity

Dovecot

Debian Linux

Ubuntu Linux

Fedora

Debian Canonical Fedoraproject Dovecot

Broken Link http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00048.html

Broken Link http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00059.html

Vendor Advisory https://dovecot.org/security

Third Party Advisory https://lists.debian.org/debian-lts-announce/2020/08/msg00024.html

Third Party Advisory https://security.gentoo.org/glsa/202009-02

Third Party Advisory https://usn.ubuntu.com/4456-1/

Third Party Advisory https://usn.ubuntu.com/4456-2/

Third Party Advisory https://www.debian.org/security/2020/dsa-4745

Exploit https://www.openwall.com/lists/oss-security/2020/08/12/2

Broken Link http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00048.html

Broken Link http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00059.html

Vendor Advisory https://dovecot.org/security

Third Party Advisory https://lists.debian.org/debian-lts-announce/2020/08/msg00024.html

Third Party Advisory https://security.gentoo.org/glsa/202009-02

and 4 more references

/ 100

high-risk

Severity 26/34 · High

Exploitability 8/34 · Low

Exposure 16/34 · Moderate