CVE-2020-28200: dovecot
CVSS: 4.3v3.1MediumModified
AliasesUBUNTU-CVE-2020-28200DEBIAN-CVE-2020-28200
Published 28-06-2021Last modified 04-08-2024
Vulnerability summary
CVE-2020-28200 is a medium (CVSS 4.3) vulnerability in dovecot. EPSS estimates a 1.97% chance of exploitation in the next 30 days, higher than 80.2% of scored vulnerabilities.
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)EPSS score
1.97%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 8 · Related 7Timeline
- 28-06-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
The Sieve engine in Dovecot before 2.3.15 allows Uncontrolled Resource Consumption, as demonstrated by a situation with a complex regular expression for the regex extension.
CVSS metrics
5 scores · 4 sources · 2 versionsMedium 4.3Preferred score · CVE.org (CNA)
CVSS:3.1/AC:L/AV:N/A:L/C:N/I:N/PR:L/S:U/UI:NSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated4.3MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
- OSV · DebianEcosystem advisory · calculated4.3MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
- NVDNIST4.3MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Medium 4.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:S/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
1.97%
Chance of exploitation in the next 30 days
Percentile
80%
Versus all other CVEs
30-day change
0.00 pp
From 1.97% on 21-09-2026
21-09-202621-10-2026
EPSS score1.97%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian1 product
- dovecot< 1:2.3.16+dfsg1-1
Dovecot1 product
- dovecot< 2.3.15
Fedoraproject1 product
- fedoraEOL33 | 34
Ubuntu1 product
- dovecotAll versions (No fix recorded)
4 vendors · 4 products
