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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.3015 ImageMagick vulnerabilities 5 October 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: ImageMagick Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Denial of Service -- Remote with User Interaction Access Confidential Data -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2018-16750 CVE-2018-16749 CVE-2018-16645 CVE-2018-16644 CVE-2018-16643 CVE-2018-16642 CVE-2018-16640 CVE-2018-16323 CVE-2018-14551 CVE-2018-14437 CVE-2018-14436 CVE-2018-14435 CVE-2018-14434 CVE-2017-13144 Reference: ESB-2018.2505 ESB-2018.2490 ESB-2018.2845 Original Bulletin: http://www.ubuntu.com/usn/usn-3785-1 - --------------------------BEGIN INCLUDED TEXT-------------------- USN-3785-1: ImageMagick vulnerabilities 4 October 2018 imagemagick vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: o Ubuntu 18.04 LTS o Ubuntu 16.04 LTS o Ubuntu 14.04 LTS Summary Several security issues were fixed in ImageMagick. Software Description o imagemagick - Image manipulation programs and library Details Due to a large number of issues discovered in GhostScript that prevent it from being used by ImageMagick safely, this update includes a default policy change that disables support for the Postscript and PDF formats in ImageMagick. This policy can be overridden if necessary by using an alternate ImageMagick policy configuration. It was discovered that several memory leaks existed when handling certain images in ImageMagick. An attacker could use this to cause a denial of service. (CVE-2018-14434, CVE-2018-14435, CVE-2018-14436, CVE-2018-14437, CVE-2018-16640, CVE-2018-16750) It was discovered that ImageMagick did not properly initialize a variable before using it when processing MAT images. An attacker could use this to cause a denial of service or possibly execute arbitrary code. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-14551) It was discovered that an information disclosure vulnerability existed in ImageMagick when processing XBM images. An attacker could use this to expose sensitive information. (CVE-2018-16323) It was discovered that an out-of-bounds write vulnerability existed in ImageMagick when handling certain images. An attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2018-16642) It was discovered that ImageMagick did not properly check for errors in some situations. An attacker could use this to cause a denial of service. (CVE-2018-16643) It was discovered that ImageMagick did not properly validate image meta data in some situations. An attacker could use this to cause a denial of service. (CVE-2018-16644) It was discovered that ImageMagick did not prevent excessive memory allocation when handling certain image types. An attacker could use this to cause a denial of service. (CVE-2018-16645) Sergej Schumilo and Cornelius Aschermann discovered that ImageMagick did not properly check for NULL in some situations when processing PNG images. An attacker could use this to cause a denial of service. (CVE-2018-16749) USN-3681-1 fixed vulnerabilities in Imagemagick. Unfortunately, the fix for CVE-2017-13144 introduced a regression in ImageMagick in Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. This update reverts the fix for CVE-2017-13144 for those releases. We apologize for the inconvenience. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS imagemagick - 8:6.9.7.4+dfsg-16ubuntu6.4 imagemagick-6.q16 - 8:6.9.7.4+dfsg-16ubuntu6.4 libmagick++-6.q16-7 - 8:6.9.7.4+dfsg-16ubuntu6.4 libmagickcore-6.q16-3 - 8:6.9.7.4+dfsg-16ubuntu6.4 libmagickcore-6.q16-3-extra - 8:6.9.7.4+dfsg-16ubuntu6.4 Ubuntu 16.04 LTS imagemagick - 8:6.8.9.9-7ubuntu5.13 imagemagick-6.q16 - 8:6.8.9.9-7ubuntu5.13 libmagick++-6.q16-5v5 - 8:6.8.9.9-7ubuntu5.13 libmagickcore-6.q16-2 - 8:6.8.9.9-7ubuntu5.13 libmagickcore-6.q16-2-extra - 8:6.8.9.9-7ubuntu5.13 Ubuntu 14.04 LTS imagemagick - 8:6.7.7.10-6ubuntu3.13 libmagick++5 - 8:6.7.7.10-6ubuntu3.13 libmagickcore5 - 8:6.7.7.10-6ubuntu3.13 libmagickcore5-extra - 8:6.7.7.10-6ubuntu3.13 To update your system, please follow these instructions: https:// wiki.ubuntu.com/Security/Upgrades. In general, a standard system update will make all the necessary changes. References o CVE-2018-14434 o CVE-2018-14435 o CVE-2018-14436 o CVE-2018-14437 o CVE-2018-14551 o CVE-2018-16323 o CVE-2018-16640 o CVE-2018-16642 o CVE-2018-16643 o CVE-2018-16644 o CVE-2018-16645 o CVE-2018-16749 o CVE-2018-16750 o LP: 1793485 - --------------------------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. 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