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.
References
Link | Resource |
---|---|
http://www.openwall.com/lists/oss-security/2017/04/11/1 | Mailing List Third Party Advisory |
http://www.securityfocus.com/bid/97536 | Third Party Advisory VDB Entry |
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2669 | Issue Tracking Third Party Advisory |
https://dovecot.org/pipermail/dovecot-news/2017-April/000341.html | Vendor Advisory |
https://github.com/dovecot/core/commit/000030feb7a30f193197f1aab8a7b04a26b42735.patch | Third Party Advisory |
https://www.debian.org/security/2017/dsa-3828 | Third Party Advisory |
Configurations
History
No history.
Information
Published : 2018-06-21 13:29
Updated : 2024-02-28 16:25
NVD link : CVE-2017-2669
Mitre link : CVE-2017-2669
CVE.ORG link : CVE-2017-2669
JSON object : View
Products Affected
dovecot
- dovecot
debian
- debian_linux
CWE
CWE-20
Improper Input Validation