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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.2556 libtiff -- Improper Input Validation 12 October 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: libtiff Publisher: FreeBSD Operating System: FreeBSD UNIX variants (UNIX, Linux, OSX) Impact/Access: Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2017-13727 CVE-2017-13726 Original Bulletin: http://www.vuxml.org/freebsd/9b5a905f-e556-452f-a00c-8f070a086181.html Comment: This advisory references vulnerabilities in products which run on platforms other than FreeBSD. It is recommended that administrators running libtiff check for an updated version of the software for their operating system. - --------------------------BEGIN INCLUDED TEXT-------------------- libtiff -- Improper Input Validation Affected packages libtiff <= 4.0.8 Details VuXML ID 9b5a905f-e556-452f-a00c-8f070a086181 Discovery 2017-08-29 Entry 2017-10-10 libtiff developers report: There is a reachable assertion abort in the function TIFFWriteDirectoryTagSubifd() in LibTIFF 4.0.8, related to tif_dirwrite.c and a SubIFD tag. A crafted input will lead to a remote denial of service attack. There is a reachable assertion abort in the function TIFFWriteDirectorySec() in LibTIFF 4.0.8, related to tif_dirwrite.c and a SubIFD tag. A crafted input will lead to a remote denial of service attack. [source] References CVE Name CVE-2017-13726 CVE Name CVE-2017-13727 URL http://bugzilla.maptools.org/show_bug.cgi?id=2727 URL http://bugzilla.maptools.org/show_bug.cgi?id=2728 URL http://www.securityfocus.com/bid/100524 - --------------------------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: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== 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 iQIVAwUBWd6tKYx+lLeg9Ub1AQhvPA/5AV5OyWdzrBIzY46Zw27Q/mOvu2ZPl7me 0lIC5odUoh6UoFmAV9Egrb/EBya52Klfag1zjbgy1YYhNoY8DDlG621Fl0vdSg+i WRjdiF08jLwufy+RyKMQA9TehmTYLEJy/LJmp6az/kwFOgxi/RfuaTisctCZzh4m uIt8JZaav/5MpwIgG1FDLLDOkSLytnWqy64bzjAmKQzgGHVtbyhZEnDpX/5cOad/ EgnO4ZP9m0JChw6AIz0lOkPvyBDC9EmmfySAqvp1molfvk52GbyvzXiB+o6m9Dv3 8TQzJj2gUZOxwBlyZocqZhCQ+v9nMjzaS4UoaXjTcfAR7WIhgXNlOW24lwZtBxQf J6uxuEvZZmNeuvu1VVqvbvFpehlcjM/0s+BTVkJAVLOsoHpvkxIdCmvfok49fZEl /NV5MiW+rJOW+XZXgaV/EKbhpW3tckAwliekZ5y3ngSWR8kosx9q3EZIAZ5awS6Y uH64YqNtUGjyfSVoaoY/sGO+cISoi+vnJ5LHzkfsWUqg6DObpTagK2wA1furdojC YPN3mkFUUktIliHOtQnIzLeAjkUqKDgKkg+6UK2hl0dYpHtgfbPIvxHLN85USqyA Y5KEwCDbmaZbsoHrxMHKd+czHLVtcOTW97AnE1z0tIeD2lEh+vGeP3cz9GVZ+OcZ 9WBrSR4CeKg= =hl/v -----END PGP SIGNATURE-----