Vulnerability CVE-2019-17022


Published: 2020-01-08

Description:
When 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.

Type:

CWE-79

(Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'))

CVSS2 => (AV:N/AC:M/Au:N/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
Redhat -> Enterprise linux desktop 
Redhat -> Enterprise linux server 
Redhat -> Enterprise linux server aus 
Redhat -> Enterprise linux server tus 
Redhat -> Enterprise linux workstation 
Mozilla -> Firefox 
Mozilla -> Firefox esr 
Debian -> Debian linux 
Canonical -> Ubuntu linux 

 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=1602843
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/

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