CVEvulnerability

CVE-2017-2669

7.5 HIGH Published 2018-06-21 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2018-06-21
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.0 ([email protected])
3.7 LOW — CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS 3.0 ([email protected])
7.5 HIGH — CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 ([email protected])
5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:N/A:P
Weaknesses
CWE-20

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.

Affected configurations

• dovecot dovecot (>= 2.2.26 <= 2.2.28) • debian debian linux 8.0

Related

Weakness · CWE (1)

  • CWE-20 Improper Input Validation weakness

References