Vulnerability Description
By carefully crafting promise resolutions, it was possible to cause an out-of-bounds read off the end of an array resized during script execution. This could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.6, Firefox < 74, Firefox < ESR68.6, and Firefox ESR < 68.6.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 74.0 |
| Mozilla | Firefox Esr | < 68.6.0 |
| Mozilla | Thunderbird | < 68.6.0 |
| Canonical | Ubuntu Linux | 16.04 |
Related Weaknesses (CWE)
References
- http://packetstormsecurity.com/files/157524/Firefox-js-ReadableStreamCloseInternThird Party AdvisoryVDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1612308Issue TrackingPermissions Required
- https://usn.ubuntu.com/4328-1/Third Party Advisory
- https://usn.ubuntu.com/4335-1/Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-08/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-09/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-10/Vendor Advisory
- http://packetstormsecurity.com/files/157524/Firefox-js-ReadableStreamCloseInternThird Party AdvisoryVDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1612308Issue TrackingPermissions Required
- https://usn.ubuntu.com/4328-1/Third Party Advisory
- https://usn.ubuntu.com/4335-1/Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-08/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-09/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-10/Vendor Advisory
FAQ
What is CVE-2020-6806?
CVE-2020-6806 is a vulnerability with a CVSS score of 8.8 (HIGH). By carefully crafting promise resolutions, it was possible to cause an out-of-bounds read off the end of an array resized during script execution. This could have led to memory corruption and a potent...
How severe is CVE-2020-6806?
CVE-2020-6806 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-6806?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox, Mozilla Firefox Esr, Mozilla Thunderbird, Canonical Ubuntu Linux.