CVE-2017-2669 describes a denial-of-service vulnerability in Dovecot versions prior to 2.2.29, specifically when 'dict' passdb and userdb are used for authentication. An unauthenticated attacker can exploit this by sending specially crafted usernames containing %variable fields to IMAP/POP3 clients, leading to excessive memory or CPU usage, causing the Dovecot process to crash or hang. This vulnerability has a CVSS v3 score of 7.5 (HIGH), indicating a high impact on availability with low attack complexity and no user interaction required. While the EPSS score is low, suggesting limited real-world exploitation, there is no public exploit code available, nor is it listed on CISA's KEV catalog, and it has received minimal community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 2.2.26, <= 2.2.28CPE matchmatch criteria | cpe:2.3:a:dovecot:dovecot:*:*:*:*:*:*:*:* | ||
8.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.