CVE-2020-28200
published 2021-06-28CVE-2020-28200: 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…
PriorityP421medium4.3CVSS 3.1
AVNACLPRLUINSUCNINAL
EPSS
1.97%
78.1th percentile
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.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | dovecot | < dovecot 1:2.3.16+dfsg1-1 (bookworm) | dovecot 1:2.3.16+dfsg1-1 (bookworm) |
| dovecot | dovecot | < 2.3.15 | 2.3.15 |
| dovecot | dovecot | >= 0 < 1:2.3.16+dfsg1-1 | 1:2.3.16+dfsg1-1 |
| dovecot | dovecot | >= 0 < 1:2.3.16+dfsg1-1 | 1:2.3.16+dfsg1-1 |
| dovecot | dovecot | >= 0 < 1:2.3.16+dfsg1-1 | 1:2.3.16+dfsg1-1 |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| msrc | cbl2_dovecot_2.3.20-1_on_cbl_mariner_2.0 | — | — |
CVSS provenance
nvdv3.14.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
nvdv2.04.0MEDIUMAV:N/AC:L/Au:S/C:N/I:N/A:P
osv4.3MEDIUM
vendor_debian4.3MEDIUM
vendor_msrc4.3MEDIUM
vendor_redhat4.3MEDIUM
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GHSA
GHSA-f6jc-wwhw-gpq7: The Sieve engine in Dovecot before 2
ghsa_unreviewed·2022-05-24
CVE-2020-28200 [MEDIUM] CWE-697 GHSA-f6jc-wwhw-gpq7: The Sieve engine in Dovecot before 2
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.
OSV
CVE-2020-28200: The Sieve engine in Dovecot before 2
osv·2021-06-28·CVSS 4.3
CVE-2020-28200 [MEDIUM] CVE-2020-28200: The Sieve engine in Dovecot before 2
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.
Red Hat
dovecot: insufficient protection against excessive resource usage allows for a DoS
vendor_redhat·2021-06-21·CVSS 4.3
CVE-2020-28200 [MEDIUM] CWE-400 dovecot: insufficient protection against excessive resource usage allows for a DoS
dovecot: insufficient protection against excessive resource usage allows for a DoS
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.
Package: dovecot (Red Hat Enterprise Linux 6) - Out of support scope
Package: dovecot (Red Hat Enterprise Linux 7) - Will not fix
Package: dovecot (Red Hat Enterprise Linux 8) - Will not fix
Package: dovecot (Red Hat Enterprise Linux 9) - Affected
Microsoft
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.
vendor_msrc·2021-06-08·CVSS 4.3
CVE-2020-28200 [MEDIUM] CWE-770 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.
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.
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Marin
Debian
CVE-2020-28200: dovecot - The Sieve engine in Dovecot before 2.3.15 allows Uncontrolled Resource Consumpti...
vendor_debian·2020·CVSS 4.3
CVE-2020-28200 [MEDIUM] CVE-2020-28200: dovecot - The Sieve engine in Dovecot before 2.3.15 allows Uncontrolled Resource Consumpti...
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.
Scope: local
bookworm: resolved (fixed in 1:2.3.16+dfsg1-1)
bullseye: open
forky: resolved (fixed in 1:2.3.16+dfsg1-1)
sid: resolved (fixed in 1:2.3.16+dfsg1-1)
trixie: resolved (fixed in 1:2.3.16+dfsg1-1)
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://dovecot.org/securityhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JB2VTJ3G2ILYWH5Y2FTY2PUHT2MD6VMI/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TK424DWFO2TKJYXZ2H3XL633TYJL4GQN/https://www.openwall.com/lists/oss-security/2021/06/28/3https://dovecot.org/securityhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JB2VTJ3G2ILYWH5Y2FTY2PUHT2MD6VMI/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TK424DWFO2TKJYXZ2H3XL633TYJL4GQN/https://www.openwall.com/lists/oss-security/2021/06/28/3
2021-06-28
Published