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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.0331 Dovecot vulnerability 6 February 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: dovecot Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Access Confidential Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2019-3814 Reference: ESB-2019.0330 Original Bulletin: http://www.ubuntu.com/usn/usn-3881-1 http://www.ubuntu.com/usn/usn-3881-2 Comment: This bulletin contains two (2) Ubuntu security advisories. - --------------------------BEGIN INCLUDED TEXT-------------------- ========================================================================== Ubuntu Security Notice USN-3881-1 February 05, 2019 dovecot vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - - Ubuntu 18.10 - - Ubuntu 18.04 LTS - - Ubuntu 16.04 LTS - - Ubuntu 14.04 LTS Summary: Dovecot could be made to expose sensitive information over the network. Software Description: - - dovecot: IMAP and POP3 email server Details: It was discovered that Dovecot incorrectly handled client certificates. A remote attacker in possession of a valid certificate with an empty username field could possibly use this issue to impersonate other users. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.10: dovecot-core 1:2.3.2.1-1ubuntu3.1 Ubuntu 18.04 LTS: dovecot-core 1:2.2.33.2-1ubuntu4.2 Ubuntu 16.04 LTS: dovecot-core 1:2.2.22-1ubuntu2.9 Ubuntu 14.04 LTS: dovecot-core 1:2.2.9-1ubuntu2.5 In general, a standard system update will make all the necessary changes. References: https://usn.ubuntu.com/usn/usn-3881-1 CVE-2019-3814 Package Information: https://launchpad.net/ubuntu/+source/dovecot/1:2.3.2.1-1ubuntu3.1 https://launchpad.net/ubuntu/+source/dovecot/1:2.2.33.2-1ubuntu4.2 https://launchpad.net/ubuntu/+source/dovecot/1:2.2.22-1ubuntu2.9 https://launchpad.net/ubuntu/+source/dovecot/1:2.2.9-1ubuntu2.5 - -------------------------------------------------------------------------------- ========================================================================== Ubuntu Security Notice USN-3881-2 February 05, 2019 dovecot vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - - Ubuntu 12.04 ESM Summary: Dovecot could be made to expose sensitive information over the network. Software Description: - - dovecot: IMAP and POP3 email server Details: USN-3881-1 fixed a vulnerability in Dovecot. This update provides the corresponding update for Ubuntu 12.04 ESM. Original advisory details:  It was discovered that Dovecot incorrectly handled client  certificates. A remote attacker in possession of a valid certificate  with an empty username field could possibly use this issue to  impersonate other users. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 12.04 ESM:  dovecot-core       1:2.0.19-0ubuntu2.6 In general, a standard system update will make all the necessary changes. References:  https://usn.ubuntu.com/usn/usn-3881-2  https://usn.ubuntu.com/usn/usn-3881-1  CVE-2019-3814 - --------------------------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 iQIVAwUBXFoqmmaOgq3Tt24GAQiYLQ/9ECs1hHHz4MetW7NBSUWplx/I/Hc6BNx2 1gTJzhNez6HFYzSmiN5o/3mlQZ7C3QJnBVqOkzv/1/i0DYTGH88QKd74t1Q4Uj6W 68TRTB7KVP4hX1jUr9rZcwzvWNsnMbVurvx9AoHfGhgt53kVoTw+pgpqZybWDIMG t66p/Xodqz6cAmQDc5Qkw4NVmaqHIWj4C/HIlLomYxC51bm/lzXM95g6WwmWAbrD 7UZ2yB/icd4HL7DvJCgSXVJp9jOgjBGNDGyk2eBKb++VK5Wbc+MrQRaUaxrnw+Cw rED/XUefrONubeq2Ax46mw9wuj8cfWe07OFQCAiZ0VNR40KZRhn8OLXi7urjk7cV hWWKAXITFmzVGIdsnDGyQ6BIixat/Ifi6/RZzagRhvvdGkrqLCK+LS1UG3i9vC2Q /c4OQ6dnm6KvMXmCiiPIZ83oFqDaPhCSivp7+IGV119YWNTNI3/yrzMW8+ENOUn5 0weblW3acJ8qYjWpjqBd7Z2V3PTD3cMhbdtYuns6Kre5YX15Uidsw6SROJVaytDe yvDuBvtb4O29E0QDfKAlTU978hXw/g97l8OitGOJZJEBA+A6a/iaDEpN4aOd3mVZ dvJeBsY92n0G4EbJdMFuuV0WdbrwltvnhPwTGPruVVSsccvgYRVb6KAJViCeGGG2 UqLbGQCplHQ= =1zWM -----END PGP SIGNATURE-----