CVE-2019-17022

NameCVE-2019-17022
DescriptionWhen pasting a &lt;style&gt; tag from the clipboard into a rich text editor, the CSS sanitizer does not escape &lt; and &gt; 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. This vulnerability affects Firefox ESR < 68.4 and Firefox < 72.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-2061-1, DLA-2071-1, DSA-4600-1, DSA-4603-1
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid78.0.2-1fixed
firefox-esr (PTS)stretch68.4.1esr-1~deb9u1fixed
stretch (security)68.10.0esr-1~deb9u1fixed
buster68.7.0esr-1~deb10u1fixed
buster (security)68.10.0esr-1~deb10u1fixed
bullseye, sid68.10.0esr-1fixed
thunderbird (PTS)stretch1:68.4.1-1~deb9u1fixed
stretch (security)1:68.10.0-1~deb9u1fixed
buster1:68.7.0-1~deb10u1fixed
buster (security)1:68.10.0-1~deb10u1fixed
bullseye, sid1:68.10.0-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)72.0-1
firefox-esrsource(unstable)68.4.0esr-1
firefox-esrsourcebuster68.4.1esr-1~deb10u1DSA-4600-1
firefox-esrsourcejessie68.4.0esr-1~deb8u1DLA-2061-1
firefox-esrsourcestretch68.4.1esr-1~deb9u1DSA-4600-1
thunderbirdsource(unstable)1:68.4.1-1
thunderbirdsourcebuster1:68.4.1-1~deb10u1DSA-4603-1
thunderbirdsourcejessie1:68.4.1-1~deb8u1DLA-2071-1
thunderbirdsourcestretch1:68.4.1-1~deb9u1DSA-4603-1

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2020-01/#CVE-2019-17022
https://www.mozilla.org/en-US/security/advisories/mfsa2020-02/#CVE-2019-17022
https://www.mozilla.org/en-US/security/advisories/mfsa2020-04/#CVE-2019-17022

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