Bugzilla – Bug 1171456
VUL-0: CVE-2020-10967: dovecot,dovecot23: Sending mail with empty quoted localpart causes submission or lmtp componentto crash.
Last modified: 2020-05-26 13:17:31 UTC
now public through https://dovecot.org/pipermail/dovecot-news/2020-May/000438.html Internal reference: DOV-1745 Vulnerability type: Improper input validation (CWE-20) Vulnerable version: 2.3.0 - 2.3.10 Vulnerable component: submission, lmtp Report confidence: Confirmed Solution status: Fixed by Vendor Fixed version: 2.3.10.1 Researcher credits: mailbox.org Vendor notification: 2020-03-20 Solution date: 2020-04-02 Public disclosure: 2020-05-18 CVE reference: CVE-2020-10967 CVSS: 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L) Vulnerability Details: Sending mail with empty quoted localpart causes submission or lmtp component to crash. Risk: Malicious actor can cause denial of service to mail delivery by repeatedly sending mails with bad sender or recipient address. Steps to reproduce: Send mail with envelope sender or recipient as ``<""@example.org>``. Workaround: For submission there is no workaround, but triggering the bug requires valid credentials. For lmtp, one can implement sufficient filtering on MTA level to prevent mails with such addresses from ending up in LMTP delivery. Solution: Upgrade to fixed version.
This is an autogenerated message for OBS integration: This bug (1171456) was mentioned in https://build.opensuse.org/request/show/807017 Factory / dovecot23
SUSE-SU-2020:1380-1: An update that fixes three vulnerabilities is now available. Category: security (important) Bug References: 1171456,1171457,1171458 CVE References: CVE-2020-10957,CVE-2020-10958,CVE-2020-10967 Sources used: SUSE Linux Enterprise Module for Server Applications 15-SP1 (src): dovecot23-2.3.10-11.1 NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.
SUSE-SU-2020:1379-1: An update that fixes three vulnerabilities is now available. Category: security (important) Bug References: 1171456,1171457,1171458 CVE References: CVE-2020-10957,CVE-2020-10958,CVE-2020-10967 Sources used: SUSE Linux Enterprise Server for SAP 15 (src): dovecot23-2.3.10-4.22.1 SUSE Linux Enterprise Server 15-LTSS (src): dovecot23-2.3.10-4.22.1 SUSE Linux Enterprise High Performance Computing 15-LTSS (src): dovecot23-2.3.10-4.22.1 SUSE Linux Enterprise High Performance Computing 15-ESPOS (src): dovecot23-2.3.10-4.22.1 NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.
openSUSE-SU-2020:0720-1: An update that fixes three vulnerabilities is now available. Category: security (important) Bug References: 1171456,1171457,1171458 CVE References: CVE-2020-10957,CVE-2020-10958,CVE-2020-10967 Sources used: openSUSE Leap 15.1 (src): dovecot23-2.3.10-lp151.2.9.1
Done