Vulnerability · Published Jul 9, 2020 · Assigned by mozilla
CVE-2020-12406
High 8.8
In plain English
A high-severity security flaw in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 64% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)8.8High
Exploit odds (30 days)1.0%top 36.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
Mozilla Developer Iain Ireland discovered a missing type check during unboxed objects removal, resulting in a crash. We presume that with enough effort that it could be exploited to run arbitrary code. This vulnerability affects Thunderbird < 68.9.0, Firefox < 77, and Firefox ESR < 68.9.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | firefox | 77.0-r0 | ALPINE-CVE-2020-12406 |
| Alpine:v3.21 | firefox | 77.0-r0 | ALPINE-CVE-2020-12406 |
| Alpine:v3.22 | firefox | 77.0-r0 | ALPINE-CVE-2020-12406 |
| Alpine:v3.23 | firefox | 77.0-r0 | ALPINE-CVE-2020-12406 |
| Alpine:v3.20 | firefox-esr | 68.9.0-r0 | ALPINE-CVE-2020-12406 |
| Alpine:v3.21 | firefox-esr | 68.9.0-r0 | ALPINE-CVE-2020-12406 |
| Alpine:v3.22 | firefox-esr | 68.9.0-r0 | ALPINE-CVE-2020-12406 |
| Alpine:v3.23 | firefox-esr | 68.9.0-r0 | ALPINE-CVE-2020-12406 |
| Alpine:v3.21 | librewolf | 77.0-r0 | ALPINE-CVE-2020-12406 |
| Alpine:v3.22 | librewolf | 77.0-r0 | ALPINE-CVE-2020-12406 |
| Alpine:v3.23 | librewolf | 77.0-r0 | ALPINE-CVE-2020-12406 |
| Alpine:v3.24 | librewolf | 77.0-r0 | ALPINE-CVE-2020-12406 |
| Alpine:v3.20 | thunderbird | 68.9.0-r0 | ALPINE-CVE-2020-12406 |
| Alpine:v3.21 | thunderbird | 68.9.0-r0 | ALPINE-CVE-2020-12406 |
| Alpine:v3.22 | thunderbird | 68.9.0-r0 | ALPINE-CVE-2020-12406 |
| Alpine:v3.23 | thunderbird | 68.9.0-r0 | ALPINE-CVE-2020-12406 |
| Debian:12 | firefox-esr | 68.9.0esr-1 | DEBIAN-CVE-2020-12406 |
| Debian:13 | firefox-esr | 68.9.0esr-1 | DEBIAN-CVE-2020-12406 |
| Debian:14 | firefox-esr | 68.9.0esr-1 | DEBIAN-CVE-2020-12406 |
| Debian:12 | thunderbird | 1:68.9.0-1 | DEBIAN-CVE-2020-12406 |
| Debian:13 | thunderbird | 1:68.9.0-1 | DEBIAN-CVE-2020-12406 |
| Debian:14 | thunderbird | 1:68.9.0-1 | DEBIAN-CVE-2020-12406 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Thunderbird | unspecified – before 68.9.0 |
| Mozilla | Firefox | unspecified – before 77 |
| Mozilla | Firefox ESR | unspecified – before 68.9 |
References
- https://www.mozilla.org/security/advisories/mfsa2020-20/ x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2020-21/ x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2020-22/ x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1639590 x_refsource_MISC
- USN-4421-1 vendor-advisory, x_refsource_UBUNTU