CVE-2017-2669
Low
Description
Dovecot before version 2.2.29 is vulnerable to a denial of service. When 'dict' passdb and userdb were used for user authentication, the username sent by the IMAP/POP3 client was sent through var_expand() to perform %variable expansion. Sending specially crafted %variable fields could result in excessive memory usage causing the process to crash (and restart), or excessive CPU usage causing all authentications to hang.
SeverityLow
CVSS3.7
Exploit probability—
Product
Dovecot
PublishedJun 21, 2018
First seenJun 21, 2018
Weakness typeCWE-20Improper input validation
How to fix
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| dovecot dovecot | 2.2.26 ≤ v ≤ 2.2.28 | — |
| debian debian_linux | 8.0 | — |
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