CVE-2020-12673: canonical ubuntu_linux Out-of-bounds Read
CVSS: 7.5v3.1HighModified
AliasesALPINE-CVE-2020-12673UBUNTU-CVE-2020-12673DEBIAN-CVE-2020-12673
Published 12-08-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-12673 is a high (CVSS 7.5) Out-of-bounds Read vulnerability in canonical ubuntu_linux. EPSS estimates a 6.19% chance of exploitation in the next 30 days, higher than 93.4% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
6.19%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Advisory lineage
Upstream 0 · Downstream 17 · Related 10Timeline
- 12-08-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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 metrics
5 scores · 4 sources · 2 versionsHigh 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
6.19%
Chance of exploitation in the next 30 days
Percentile
93%
Versus all other CVEs
30-day change
0.00 pp
From 6.19% on 20-09-2026
20-09-202620-10-2026
EPSS score6.19%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (openwall.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Debian2 products
- dovecot< 1:2.3.11.3+dfsg1-1
- debian_linuxEOL9.0 | 10.0
Alpine1 product
- dovecot< 2.3.10.1-r1 | < 2.3.11.3-r0
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 18.04 | 20.04
Dovecot1 product
- dovecot< 2.3.11.3
Fedoraproject1 product
- fedoraEOL31 | 32 | 33
Ubuntu1 product
- dovecot< 1:2.2.9-1ubuntu2.6+esm3 | < 1:2.2.22-1ubuntu2.13 | < 1:2.2.33.2-1ubuntu4.6 | < 1:2.3.7.2-1ubuntu3.2
6 vendors · 7 products
References
18 links- www.openwall.com/lists/oss-security/2020/08/12/2X Refsource CONFIRMExploitMailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2020/08/msg00024.htmlMailing ListX Refsource MLISTThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-08/msg00048.htmlVendor AdvisoryX Refsource SUSEBroken Link
- lists.opensuse.org/opensuse-security-announce/2020-08/msg00059.htmlVendor AdvisoryX Refsource SUSEBroken Link