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{"acknowledgement": "Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Ben Seri, Gregory Vishnepolsky, and Samy Kamkar as the original reporters.", "affected_release": [{"advisory": "RHSA-2020:5561", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "firefox-0:78.6.0-1.el7_9", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-12-16T00:00:00Z"}, {"advisory": "RHSA-2020:5618", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "thunderbird-0:78.6.0-1.el7_9", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-12-17T00:00:00Z"}, {"advisory": "RHSA-2020:5562", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "firefox-0:78.6.0-1.el8_3", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-12-16T00:00:00Z"}, {"advisory": "RHSA-2020:5624", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "thunderbird-0:78.6.0-1.el8_3", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-12-17T00:00:00Z"}, {"advisory": "RHSA-2020:5565", "cpe": "cpe:/a:redhat:rhel_e4s:8.0", "package": "firefox-0:78.6.0-1.el8_0", "product_name": "Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions", "release_date": "2020-12-16T00:00:00Z"}, {"advisory": "RHSA-2020:5645", "cpe": "cpe:/a:redhat:rhel_e4s:8.0", "package": "thunderbird-0:78.6.0-1.el8_0", "product_name": "Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions", "release_date": "2020-12-21T00:00:00Z"}, {"advisory": "RHSA-2020:5564", "cpe": "cpe:/a:redhat:rhel_eus:8.1", "package": "firefox-0:78.6.0-1.el8_1", "product_name": "Red Hat Enterprise Linux 8.1 Extended Update Support", "release_date": "2020-12-16T00:00:00Z"}, {"advisory": "RHSA-2020:5644", "cpe": "cpe:/a:redhat:rhel_eus:8.1", "package": "thunderbird-0:78.6.0-1.el8_1", "product_name": "Red Hat Enterprise Linux 8.1 Extended Update Support", "release_date": "2020-12-21T00:00:00Z"}, {"advisory": "RHSA-2020:5563", "cpe": "cpe:/a:redhat:rhel_eus:8.2", "package": "firefox-0:78.6.0-1.el8_2", "product_name": "Red Hat Enterprise Linux 8.2 Extended Update Support", "release_date": "2020-12-16T00:00:00Z"}, {"advisory": "RHSA-2020:5622", "cpe": "cpe:/a:redhat:rhel_eus:8.2", "package": "thunderbird-0:78.6.0-1.el8_2", "product_name": "Red Hat Enterprise Linux 8.2 Extended Update Support", "release_date": "2020-12-17T00:00:00Z"}], "bugzilla": {"description": "Mozilla: Internal network hosts could have been probed by a malicious webpage", "id": "1908025", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1908025"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.1", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "status": "verified"}, "cwe": "CWE-200", "details": ["Using techniques that built on the slipstream research, a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.", "The Mozilla Foundation Security Advisory describes this flaw as:\nUsing techniques that built on the slipstream research, a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine."], "name": "CVE-2020-26978", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Out of support scope", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 6"}], "public_date": "2020-12-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-26978\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-26978\nhttps://www.mozilla.org/en-US/security/advisories/mfsa2020-55/#CVE-2020-26978"], "threat_severity": "Moderate", "upstream_fix": "thunderbird 78.6, firefox 78.6"}