Arch Linux Security Advisory ASA-202001-1 ========================================= Severity: Critical Date : 2020-01-08 CVE-ID : CVE-2019-17016 CVE-2019-17017 CVE-2019-17020 CVE-2019-17022 CVE-2019-17023 CVE-2019-17024 CVE-2019-17025 Package : firefox Type : multiple issues Remote : Yes Link : https://security.archlinux.org/AVG-1084 Summary ======= The package firefox before version 72.0-1 is vulnerable to multiple issues including arbitrary code execution, insufficient validation, access restriction bypass and denial of service. Resolution ========== Upgrade to 72.0-1. # pacman -Syu "firefox>=72.0-1" The problems have been fixed upstream in version 72.0. Workaround ========== None. Description =========== - CVE-2019-17016 (insufficient validation) A security issue has been found in Firefox before 72.0. When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer incorrectly rewrites a @namespace rule. This could allow for injection into certain types of websites resulting in data exfiltration. - CVE-2019-17017 (arbitrary code execution) A type confusion issue has been found in Firefox before 72.0, in XPCVariant.cpp where, due to a missing case handling object types, a type confusion vulnerability could occur, resulting in a crash. - CVE-2019-17020 (access restriction bypass) A Content Security Policy bypass has been found in Firefox before 72.0, where the CSP is not applied to XSL stylesheets applied to XML documents. If the XSL sheet e.g. includes JavaScript, it would bypass any of the restrictions of the Content Security Policy applied to the XML document. - CVE-2019-17022 (insufficient validation) A security issue has been found in Firefox before 72.0, where CSS sanitization does not escape HTML tags. When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer does not escape < and > characters. Because the resulting string is pasted directly into the text node of the element this does not result in a direct injection into the webpage; however, if a webpage subsequently copies the node's innerHTML, assigning it to another innerHTML, this would result in an XSS vulnerability. Two WYSIWYG editors were identified with this behavior, more may exist. - CVE-2019-17023 (denial of service) A security issue has been found in the NSS component of Firefox before 72.0. After a HelloRetryRequest has been sent, the client may negotiate a lower protocol that TLS 1.3, resulting in an invalid state transition in the TLS State Machine. If the client gets into this state, incoming Application Data records will be ignored. - CVE-2019-17024 (arbitrary code execution) Several memory safety issues have been found in Firefox before 72.0 and Firefox ESR before 68.4. Some of these bugs showed evidence of memory corruption and Mozilla presumes that with enough effort some of these could have been exploited to run arbitrary code. - CVE-2019-17025 (arbitrary code execution) Several memory safety issues have been found in Firefox before 72.0. Some of these bugs showed evidence of memory corruption and Mozilla presumes that with enough effort some of these could have been exploited to run arbitrary code. Impact ====== A remote attacker could bypass security measures or execute arbitrary code on the affected host. References ========== https://www.mozilla.org/en-US/security/advisories/mfsa2020-01/ https://www.mozilla.org/en-US/security/advisories/mfsa2020-01/#CVE-2019-1701... https://bugzilla.mozilla.org/show_bug.cgi?id=1599181 https://www.mozilla.org/en-US/security/advisories/mfsa2020-01/#CVE-2019-1701... https://bugzilla.mozilla.org/show_bug.cgi?id=1603055 https://www.mozilla.org/en-US/security/advisories/mfsa2020-01/#CVE-2019-1702... https://bugzilla.mozilla.org/show_bug.cgi?id=1597645 https://www.mozilla.org/en-US/security/advisories/mfsa2020-01/#CVE-2019-1702... https://bugzilla.mozilla.org/show_bug.cgi?id=1602843 https://www.mozilla.org/en-US/security/advisories/mfsa2020-01/#CVE-2019-1702... https://bugzilla.mozilla.org/show_bug.cgi?id=1590001 https://www.mozilla.org/en-US/security/advisories/mfsa2020-01/#CVE-2019-1702... https://bugzilla.mozilla.org/buglist.cgi?bug_id=1507180%2C1595470%2C1598605%... https://www.mozilla.org/en-US/security/advisories/mfsa2020-01/#CVE-2019-1702... https://bugzilla.mozilla.org/buglist.cgi?bug_id=1328295%2C1328300%2C1590447%... https://security.archlinux.org/CVE-2019-17016 https://security.archlinux.org/CVE-2019-17017 https://security.archlinux.org/CVE-2019-17020 https://security.archlinux.org/CVE-2019-17022 https://security.archlinux.org/CVE-2019-17023 https://security.archlinux.org/CVE-2019-17024 https://security.archlinux.org/CVE-2019-17025