Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.3282 dovecot: Multiple vulnerabilities 29 August 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Dovecot Publisher: FreeBSD Operating System: FreeBSD Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2019-11500 Reference: ESB-2019.3261 Original Bulletin: https://dovecot.org/pipermail/dovecot/2019-August/116874.html - --------------------------BEGIN INCLUDED TEXT-------------------- Dovecot -- improper input validation Affected packages dovecot < 2.3.7.2 dovecot-pigeonhole < 0.5.7.2 Details VuXML ID abaaecda-ea16-43e2-bad0-d34a9ac576b1 Discovery 2019-04-13 Entry 2019-08-28 Aki Tuomi reports: Vulnerability Details: IMAP and ManageSieve protocol parsers do not properly handle NUL byte when scanning data in quoted strings, leading to out of bounds heap memory writes. Risk: This vulnerability allows for out-of-bounds writes to objects stored on the heap up to 8096 bytes in pre-login phase, and 65536 bytes post-login phase, allowing sufficiently skilled attacker to perform complicated attacks that can lead to leaking private information or remote code execution. Abuse of this bug is very difficult to observe, as it does not necessarily cause a crash. Attempts to abuse this bug are not directly evident from logs. [source] References CVE Name CVE-2019-11500 URL https://dovecot.org/pipermail/dovecot/2019-August/116874.html - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXWdPGmaOgq3Tt24GAQhemg//U9LXp/FIXNyKahdwklHuj0siIWNkCYgh d6lZ8Ni6wqcqjsnewqRWSKtoP/P7H2QZur5DWq66P9MNrYKFCoyPnmtIcCxl3rUQ 1knxtwleu9Qljwr6W3t3D006skn7FFOxNyqCEN6I1Gk1vg9mOR/zP2BlUJHs4QW+ 2qtHjFVODDYVA2uRlG501jwJPacy1bdGkY0opLqtiMnN55ChDiHTPwCE+WIhsh51 mvCozwZCekd+y7KR3ss7bggryreMlEf4Rs5eZgez26pxHHUSFgSVQzPzxKgoBwfq LMZ+YOkLWQ3Hg5HH7U45S/htBpqT/z5CRFF4FaUDVWi1RYXKffkUgRarhBIKldjn +U2G3ppkCplerqdKd2hRZdTvMzwEpS+dNyoTnl8LrFzBzRbPX8nj1xFou9miKtmW KPT0IgI8aRyq3FROLh1xCe7Hll1BflHjAIfKfqy3VqN+ctOEgMV2MRx59VaYYbmF 3TEbAhr4jP9MSDw1V+vH4loNh6HGkxnJcNlT3yol7gfYdrUMceOyDA2hThMiJc29 mYtciobibVfcHwbtwqyoMJFk324tZ/sfqxmVwfTT+CUpq5IbS2qZjxCe4pjiwkNd C0GTcwWUxzN8kl2/xfx/Zh0pIlWQUvU+QvUbxTWijwtH3/EAIlZFg4a4ZG3BeW7n zVtJ9Jt9Pu8= =QWjV -----END PGP SIGNATURE-----