Description

When pasting a &lt;style&gt; 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. This vulnerability affects Firefox ESR < 68.4 and Firefox < 72.

References

http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00029.html

http://packetstormsecurity.com/files/155912/Slackware-Security-Advisory-mozilla-thunderbird-Updates.html

https://access.redhat.com/errata/RHSA-2020:0085

https://access.redhat.com/errata/RHSA-2020:0086

https://access.redhat.com/errata/RHSA-2020:0111

https://access.redhat.com/errata/RHSA-2020:0120

https://access.redhat.com/errata/RHSA-2020:0123

https://access.redhat.com/errata/RHSA-2020:0127

https://bugzilla.mozilla.org/show_bug.cgi?id=1599181

https://lists.debian.org/debian-lts-announce/2020/01/msg00005.html

https://lists.debian.org/debian-lts-announce/2020/01/msg00016.html

https://seclists.org/bugtraq/2020/Jan/12

https://seclists.org/bugtraq/2020/Jan/18

https://seclists.org/bugtraq/2020/Jan/26

https://usn.ubuntu.com/4234-1/

https://usn.ubuntu.com/4241-1/

https://www.debian.org/security/2020/dsa-4600

https://www.debian.org/security/2020/dsa-4603

https://www.mozilla.org/security/advisories/mfsa2020-01/

https://www.mozilla.org/security/advisories/mfsa2020-02/

Details

Risk Information

CVSS v2

CVSS v3