vulnerability
Arch Linux: Denial of service (CVE-2017-2669)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:N/AC:L/Au:N/C:N/I:N/A:P) | Jun 21, 2018 | Jul 11, 2025 | Nov 27, 2025 |
Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Published
Jun 21, 2018
Added
Jul 11, 2025
Modified
Nov 27, 2025
Description
A security issue has been found in Dovecot >= 2.2.26 and <= 2.2.28. If the "dict" passdb is used for authentication, the username sent by the client is passed to the var_expand() function and double expansion of %-variables is performed. A remote unauthenticated attacker could then send a specially crafted username containing %variables to cause a denial of service.
Solution
arch-linux-upgrade-latest
References
- CVE-2017-2669
- https://attackerkb.com/topics/CVE-2017-2669
- URL-http://www.openwall.com/lists/oss-security/2017/04/11/1
- URL-http://www.securityfocus.com/bid/97536
- URL-https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2669
- URL-https://dovecot.org/pipermail/dovecot-news/2017-April/000341.html
- URL-https://github.com/dovecot/core/commit/000030feb7a30f193197f1aab8a7b04a26b42735.patch
- URL-https://security.archlinux.org/ASA-201705-1
- URL-https://www.debian.org/security/2017/dsa-3828
- CWE-20
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