CVE-2020-12673
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (6.19%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 6.19% probability · 93th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- dovecot/dovecot · debian/debian linux · canonical/ubuntu linux · fedoraproject/fedora
- Source
- cve@mitre.org
EPSS 6.2% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00048.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00059.htmlBroken Link
- https://dovecot.org/securityVendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/08/msg00024.htmlThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4AAX2MJEULPVSRZOBX3PNPFSYP4FM4TT/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EYZU6CHA3VMYYAUCMHSCCQKJEVEIKPQ2/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XKKAL3OMG76ZZ7CIEMQP2K6KCTD2RAKE/
- https://security.gentoo.org/glsa/202009-02Third 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-4745Third Party Advisory
- https://www.openwall.com/lists/oss-security/2020/08/12/2Exploit, Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00048.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00059.htmlBroken Link
- https://dovecot.org/securityVendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/08/msg00024.htmlThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4AAX2MJEULPVSRZOBX3PNPFSYP4FM4TT/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EYZU6CHA3VMYYAUCMHSCCQKJEVEIKPQ2/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XKKAL3OMG76ZZ7CIEMQP2K6KCTD2RAKE/
- https://security.gentoo.org/glsa/202009-02Third 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-4745Third Party Advisory
- https://www.openwall.com/lists/oss-security/2020/08/12/2Exploit, Mailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.