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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.2729 openssh regression update 13 September 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: openssh Publisher: Debian Operating System: Debian GNU/Linux 8 Impact/Access: Unauthorised Access -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2016-1908 Reference: ASB-2016.0066 ESB-2018.2693 ESB-2016.0737 Original Bulletin: https://lists.debian.org/debian-lts-announce/2018/09/msg00014.html - --------------------------BEGIN INCLUDED TEXT-------------------- - --H+4ONPRPur6+Ovig Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Package : openssh Version : 1:6.7p1-5+deb8u7 Debian Bug : 908652 The security update of OpenSSH announced as DLA 1500-1 introduced a bug in openssh-client: when X11 forwarding is enabled (via system-wide configuration in ssh_config or via -X command line switch), but no DISPLAY is set, the client produces a "DISPLAY "(null)" invalid; disabling X11 forwarding" warning. These bug was introduced by the patch set to fix the CVE-2016-1908 issue. For reference, the following is the relevant section of the original announcement: CVE-2016-1908 OpenSSH mishandled untrusted X11 forwarding when the X server disables the SECURITY extension. Untrusted connections could obtain trusted X11 forwarding privileges. Reported by Thomas Hoger. For Debian 8 "Jessie", this problem has been fixed in version 1:6.7p1-5+deb8u7. We recommend that you upgrade your openssh packages. Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS - --H+4ONPRPur6+Ovig Content-Type: application/pgp-signature; name="signature.asc" - -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEwUqnBPVvaa0NAVzHFX/a4RXx4q0FAluZcOoACgkQFX/a4RXx 4q2sFw/+P1hHledFVkBYMCKSnalJ3wJeVqHEC8u6ls8upqr1gp+fzyCznbhRvM8d yy3x5OFwZw3zm4SBa1DS6IlIxdVdxsLExaMIxytWz+QmmxF2l6lEh1E+y0hUQLUm VWRobc72im9f8AabiMias7/SErYmI52NVoElvRUuchUUk23Ckjx0RI8n981xYc02 fJ+ngGcOQHdaHYykOtKqZfvnp0zobKQQ9J7LgCj6qtk3/VbdCeHvYiXh1pF3ttMs IdDldINYZdSLHqhml7JiOaV5JsCyjAOurExhyqhAZAjSpgBahs1yN7V6Q8KW6Pas y8wfogX7BtnXCp9nvvAF0CNNmdWyfKY/+h/3yIq4vjc+JjgKeVELbcKwX1JdDg7F +kVjdhoC8stEapFa5C1+Z1Nc+3CxfFBQ3GI/5oBeszK6b9mImsiVgEAXnNcFP33I ZzO0nmTcEfqNdiLHHA6pivZSiUpF2vZ4k3baWBl6MAbmGrxopykht/qIe3dPf9ok LpHj4ElqjJchZyUKIpKtKR36e74y5pTAQ8RsdzSa74Njtf1+DCZ04LTh5edE3Jkv u42iWdZuKqKTnuPRYpYL8IdHZqE6PB1mT4H6bHOcA/UwU55veeQZQjJQPyakCtqT oEJscgtBFLHMxa7CfFv6Kh0sTLBo22Df3x3/Uqurkr4Qy8rMGLg= =gQ8D - -----END PGP SIGNATURE----- - --H+4ONPRPur6+Ovig-- - --------------------------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 iQIVAwUBW5nrC2aOgq3Tt24GAQiHhg//S6xhXz/gCUUh2TTqzO5nHoloAydoCc9D 912UHXBb3f0KBoLSBgDgrlQbrVWMpnRjkbIVOEVSQDEHz9Z6joHH/VwEREOHzZAi mtLH+6XaLChh7R1U8ZgQG+GgIGU+DsVpl5kmFFLYWqRN9j+YtY/rqxcjRNP5wdcy h1Goz7awg86QQYHfCbGZIIgNxcXZ15dcqAOZxwttgexn6CM+eV2iD1fuL+G5ZfFe rqYijn65mRhGngVIzsxg+wAjE1/jTo4Rx8tRUzmbh27hQEqvD6ciztXwccxUY30p UHJXehlkUOLMN762VBVQpRS9z2uXsDGZ1/GoTSV+5+ZJauRXYMIblTbhls1KQUIi RQxNsn1vk6Vj7j04razPR5GRRrqAM7eHwhe42j9k3cl7IMAxEtLqV6E70GugtNSG DZGNI4xixYAamvDr0dz5GPn116wn9RtTxTlVn0N0c2IqBrD/dW32ZVp/9+9mBOUd hZetDoacfS1ISNor50YHL+1U5lzOm/alhYUr9JlkLB6xwP5NXqWb+7b8HMj6tNOX +TsSL8TUUwhdfE38iKEl0aXHF8NtzBbv32fzjP7iMbgjKpLyB8Kee+Lym+Pi1MmA xJdR4L8su7qNPWOtTRG2S/qygHSXWOa4f++mMUvjufORgLlznCHqSppXzXRmPAAI Q1uI7P2B8Lk= =hzBt -----END PGP SIGNATURE-----