CVE-2017-2669: Input Validation
First published: Mon Apr 10 2017(Updated: )
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.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/dovecot | 1:2.3.4.1-5+deb10u6 1:2.3.4.1-5+deb10u7 1:2.3.13+dfsg1-2+deb11u1 1:2.3.19.1+dfsg1-2.1 1:2.3.20+dfsg1-1 1:2.3.21+dfsg1-1 | |
| Dovecot Dovecot | >=2.2.26<=2.2.28 | |
| Debian Debian Linux | =8.0 |
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Reference Links
- https://security-tracker.debian.org/tracker/CVE-2017-2669
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-2669
- https://wiki2.d
- https://github.com/BytemarkHosting/sy
- https://github.com/dovecot/core/commit/21d083ffb353b33f902a78f3f2781868fc457557
- https://github.com/dovecot/core/commit/a3783f8a3c9cd816b51e77a922f82301512fcf22
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=860049
- https://github.com/dovecot/core/commit/000030feb7a30f193197f1aab8a7b04a26b42735
- http://www.openwall.com/lists/oss-security/2017/04/11/1
- http://www.securityfocus.com/bid/97536
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2669
- https://dovecot.org/pipermail/dovecot-news/2017-April/000341.html
- https://github.com/dovecot/core/commit/000030feb7a30f193197f1aab8a7b04a26b42735.patch
- https://www.debian.org/security/2017/dsa-3828
- collector/debian-bugs
- alias/CVE-2017-2669
- collector/security-tracker-debian
- agent/type
- agent/softwarecombine
- agent/first-publish-date
- collector/mitre-cve
- source/MITRE
- agent/author
- agent/weakness
- agent/references
- agent/severity
- agent/last-modified-date
- agent/description
- agent/event
- agent/source
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- package-manager/debian
- vendor/dovecot
- canonical/dovecot dovecot
- version/dovecot dovecot/2.2.26
- version/dovecot dovecot/2.2.28
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/8.0