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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT Security Bulletin ASB-2017.0207 Mozilla Foundation Security Advisory 2017-27 5 December 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: firefox Operating System: UNIX variants (UNIX, Linux, OSX) Windows Impact/Access: Reduced Security -- Remote with User Interaction Access Confidential Data -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2017-7843 CVE-2017-7844 Member content until: Thursday, January 4 2018 OVERVIEW "Security vulnerabilities fixed in Firefox 57.0.1" [1] IMPACT Mozilla has given the following information concerning these vulnerabilities: "#CVE-2017-7843: Web worker in Private Browsing mode can write IndexedDB data REPORTER Konark IMPACT HIGH Description When Private Browsing mode is used, it is possible for a web worker to write persistent data to IndexedDB and fingerprint a user uniquely. IndexedDB should not be available in Private Browsing mode and this stored data will persist across multiple private browsing mode sessions because it is not cleared when exiting. References Bug 1410106 #CVE-2017-7844: Visited history information leak through SVG image REPORTER Daniel Jackson IMPACT HIGH Description A combination of an external SVG image referenced on a page and the coloring of anchor links stored within this image can be used to determine which pages a user has in their history. This can allow a malicious website to query user history. Note: This issue only affects Firefox 57. Earlier releases are not affected. References Bug 1420001" [1] MITIGATION Mozilla recommends updating Firefox to version 57.0.1 REFERENCES [1] Mozilla Foundation Security Advisory 2017-27 https://www.mozilla.org/en-US/security/advisories/mfsa2017-27/ AusCERT has made every effort to ensure that the information contained in this document is accurate. However, the decision to use the information described is the responsibility of each user or organisation. 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. =========================================================================== 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 iQIVAwUBWiX0a4x+lLeg9Ub1AQi85hAAho4P7uwdfvtxwI5euy4jXzx1hgs+aX0I fVeMKmEaCzEDdgud0Y7IPP5hQI+DlLtWc0Hym3ElCmNNkP3ri+YPqhOvyqeotRLx 3zHW1KlYDQiIP2Y0OheTY29r2x/gzaHB9MyfxLs8x97f8WH25D9GS3H/VgjgPFGP lyYsESFSyuO/HME3o3K5nF1iw2gcEu2OROJnETY5bS7v/mUVPS4Pg+cKeMy30ZfM qY3kluSMhNHnGi/bkYVL6ArxR+jYkRscA30wzmGzStk20m5GY+DHzZdb96O8QhFM w7D4ypB27GKg+NrMTRNFh6iCQd7oWDzQuR48nwnbi3lBNBGXCRKZ1afHsloBW7AX fd2kqMmbhiX3GSEa3yh3jR4hzlsWPhEDd0s2MXIol/Yc0Bhp7Osx5JiIsZGD1HxF hXTpP3abOUzetwuS3y8mhZ5/WDWFJoaFlPGHQGVlcw9WVjl+8r1cq0jfP1x84yDZ bXURjZCe9POqa1P5F2hgGhT+tzCz+qJQTuZvb/Ab8SezbjmHBjKTWDJ6g6ysMi2B dLAytDO4IK37giGtQqMcCuRbktHiY0SuYOfhCR7HRpgq1YmkGxPLrAKIymSkEKXR 6R/q0sgB9jdMcU/3Ii6vBJCbn/vO5kGJp6cf7jaMUmbWnB7vGCOpv2F528O052Rh HIFLSnIgXBM= =Ijn6 -----END PGP SIGNATURE-----