Vulnerability · Published Aug 12, 2020 · Assigned by mitre
CVE-2020-12100
High 7.5
In plain English
A high-severity security flaw in the dovecot package (Alpine). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 5.3% (higher than 93% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.5High
Exploit odds (30 days)5.3%top 7.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
In Dovecot before 2.3.11.3, uncontrolled recursion in submission, lmtp, and lda allows remote attackers to cause a denial of service (resource consumption) via a crafted e-mail message with deeply nested MIME parts.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | dovecot | 2.3.11.3-r0 | ALPINE-CVE-2020-12100 |
| Alpine:v3.21 | dovecot | 2.3.11.3-r0 | ALPINE-CVE-2020-12100 |
| Alpine:v3.22 | dovecot | 2.3.11.3-r0 | ALPINE-CVE-2020-12100 |
| Alpine:v3.23 | dovecot | 2.3.11.3-r0 | ALPINE-CVE-2020-12100 |
| Alpine:v3.24 | dovecot | 2.3.11.3-r0 | ALPINE-CVE-2020-12100 |
| Debian:12 | dovecot | 1:2.3.11.3+dfsg1-1 | DEBIAN-CVE-2020-12100 |
| Debian:13 | dovecot | 1:2.3.11.3+dfsg1-1 | DEBIAN-CVE-2020-12100 |
| Debian:14 | dovecot | 1:2.3.11.3+dfsg1-1 | DEBIAN-CVE-2020-12100 |
Affected products (as reported)
References
- https://dovecot.org/security x_refsource_MISC
- [oss-security] 20200812 CVE-2020-12100: Dovecot IMAP server: Receiving mail with deeply nested MIME parts leads to resource exhaustion mailing-list, x_refsource_MLIST
- DSA-4745 vendor-advisory, x_refsource_DEBIAN
- [debian-lts-announce] 20200815 [SECURITY] [DLA 2328-1] dovecot security update mailing-list, x_refsource_MLIST
- USN-4456-1 vendor-advisory, x_refsource_UBUNTU
- USN-4456-2 vendor-advisory, x_refsource_UBUNTU
- FEDORA-2020-cd8b8f887b vendor-advisory, x_refsource_FEDORA
- GLSA-202009-02 vendor-advisory, x_refsource_GENTOO
- FEDORA-2020-b8ebc4201e vendor-advisory, x_refsource_FEDORA
- FEDORA-2020-d737c57172 vendor-advisory, x_refsource_FEDORA
- [oss-security] 20210104 CVE-2020-25275: Dovecot: MIME parsing crash mailing-list, x_refsource_MLIST
- 20210106 CVE-2020-24386: IMAP hibernation allows accessing other peoples mail mailing-list, x_refsource_FULLDISC