Uncontrolled resource consumption in dovecot
Priority LOW 31CWE-400Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 2 without a fix
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-400.
Summary
A denial of service flaw was found in dovecot before 2.2.34. An attacker able to generate random SNI server names could exploit TLS SNI configuration lookups, leading to excessive memory usage and the process to restart.
Why it matters now
EPSS 0.02553 85th percentileScored 2026-11-07
Fix Partial dovecot (The Dovecot Project): 2.2.34Red Hat: 2 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| The Dovecot Project | dovecot | before 2.2.34 | 2.2.34 | Patch available | CNA |
- dovecot VendorThe Dovecot Project Affected before 2.2.34 Fixed in 2.2.34 Patch available CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:dovecot:dovecot:*:*:*:*:*:*:*:* | before 2.2.34 | Vulnerable | The Dovecot Project |
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* | 14.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* | 16.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:* | 17.10 | Vulnerable | Canonical |
- cpe:2.3:a:dovecot:dovecot:*:*:*:*:*:*:*:* Versions before 2.2.34 Vulnerable ·The Dovecot Project
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:* Versions 17.10 Vulnerable ·Canonical
Remediation
- Fix · CNA dovecot (The Dovecot Project) Fixed in 2.2.34
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
The Dovecot Project Dovecot — USN-3587-1
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2017-10567 Out-of-bounds read in DovecotPriority MEDIUM 48
- Advisory ·
The Dovecot Project Dovecot — USN-3587-2
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2017-10567 Out-of-bounds read in DovecotPriority MEDIUM 48
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix yet |
| Red Hat Enterprise Linux 7 | Affected | No fix yet |
Not affected: 2 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2017-15130
- 2026-10-03 Alias added: GHSA-36px-qc55-gxh7
References
Advisory 6
More The Dovecot Project Dovecot vulnerabilities
- TI-2019-08591 In Dovecot before 2.2.36.4 and 2.3.x before 2.3.7.2 (and Pigeonhole before 0.5.7.2)… CVSS 3.0CRITICAL 9.8
- TI-2020-05686 lib-smtp in submission-login and lmtp in Dovecot 2.3.9 before 2.3.9.3 mishandles… CVSS 3.1HIGH 7.5
- TI-2016-07114 The auth component in Dovecot before 2.2.27, when auth-policy is configured, allows a… CVSS 3.0MEDIUM 5.9
- TI-2017-10567 Out-of-bounds read in Dovecot CVSS 3.0HIGH 7.1
- TI-2022-12706 An issue was discovered in the auth component in Dovecot 2.2 and 2.3 before 2.3.20. CVSS 3.1HIGH 8.8
- TI-2020-08835 In Dovecot before 2.3.10.1, unauthenticated sending of malformed parameters to a NOOP… CVSS 3.1HIGH 7.5
Sources
- CVE-2017-15130 · CVE Program
- CVE-2017-15130 · NVD
- FIRST EPSS
- GHSA-36px-qc55-gxh7 · GitHub Advisory Database · CC BY 4.0
- CVE-2017-15130 · Red Hat security data · CC BY 4.0
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