Vulnerability Description
A vulnerability exists where if a user opens a locally saved HTML file, this file can use file: URIs to access other files in the same directory or sub-directories if the names are known or guessed. The Fetch API can then be used to read the contents of any files stored in these directories and they may uploaded to a server. It was demonstrated that in combination with a popular Android messaging app, if a malicious HTML attachment is sent to a user and they opened that attachment in Firefox, due to that app's predictable pattern for locally-saved file names, it is possible to read attachments the victim received from other correspondents. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 68.0 |
| Mozilla | Firefox Esr | < 60.8 |
| Mozilla | Thunderbird | < 60.8 |
| Debian | Debian Linux | 8.0 |
| Opensuse | Leap | 15.0 |
| Suse | Package Hub | - |
| Suse | Linux Enterprise | 12.0 |
References
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00055.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00058.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00073.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.htmlMailing ListThird Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1558299Issue TrackingPermissions Required
- https://lists.debian.org/debian-lts-announce/2019/08/msg00001.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/08/msg00002.htmlMailing ListThird Party Advisory
- https://security.gentoo.org/glsa/201908-12Third Party Advisory
- https://security.gentoo.org/glsa/201908-20Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-21/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-22/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-23/Vendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00055.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00058.htmlMailing ListThird Party Advisory
FAQ
What is CVE-2019-11730?
CVE-2019-11730 is a vulnerability with a CVSS score of 6.5 (MEDIUM). A vulnerability exists where if a user opens a locally saved HTML file, this file can use file: URIs to access other files in the same directory or sub-directories if the names are known or guessed. T...
How severe is CVE-2019-11730?
CVE-2019-11730 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-11730?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox, Mozilla Firefox Esr, Mozilla Thunderbird, Debian Debian Linux, Opensuse Leap.