Out-of-bounds Read in Dovecot
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.062 (93.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 93.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.062 · newest: 0.062 · change: 0.000
Affected products
- Dovecot
- Canonical Ubuntu Linux — versions 14.04, 16.04, 18.04
- Debian Linux — versions 9.0, 10.0
- Fedoraproject Fedora — versions 31, 32, 33
Weakness classification (CWE)
Public proof-of-concept exploits
References
- dovecot.org/security (Vendor Advisory)
- www.openwall.com/lists/oss-security/2020/08/12/2 (Exploit, Mailing List, Third Party Advisory)
- www.debian.org/security/2020/dsa-4745 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2020/08/msg00024.html (mailing-list, Third Party Advisory)
- usn.ubuntu.com/4456-1/ (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/4456-2/ (vendor-advisory, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-08/msg00048.html (vendor-advisory, Broken Link)
- lists.opensuse.org/opensuse-security-announce/2020-08/msg00059.html (vendor-advisory, Broken Link)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.gentoo.org/glsa/202009-02 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-12673?
- CVE-2020-12673 is a high-severity vulnerability in Dovecot, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2020-08-12.
- How severe is CVE-2020-12673?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-12673 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.