Vulnerability · Published May 26, 2020 · Assigned by mozilla
CVE-2020-12395
Critical 9.8
In plain English
A critical-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 2.6% (higher than 85% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)9.8Critical
Exploit odds (30 days)2.6%top 14.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
Mozilla developers and community members reported memory safety bugs present in Firefox 75 and Firefox ESR 68.7. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | firefox | 76.0-r0 | ALPINE-CVE-2020-12395 |
| Alpine:v3.21 | firefox | 76.0-r0 | ALPINE-CVE-2020-12395 |
| Alpine:v3.22 | firefox | 76.0-r0 | ALPINE-CVE-2020-12395 |
| Alpine:v3.23 | firefox | 76.0-r0 | ALPINE-CVE-2020-12395 |
| Alpine:v3.20 | firefox-esr | 68.8.0-r0 | ALPINE-CVE-2020-12395 |
| Alpine:v3.21 | firefox-esr | 68.8.0-r0 | ALPINE-CVE-2020-12395 |
| Alpine:v3.22 | firefox-esr | 68.8.0-r0 | ALPINE-CVE-2020-12395 |
| Alpine:v3.23 | firefox-esr | 68.8.0-r0 | ALPINE-CVE-2020-12395 |
| Alpine:v3.21 | librewolf | 76.0-r0 | ALPINE-CVE-2020-12395 |
| Alpine:v3.22 | librewolf | 76.0-r0 | ALPINE-CVE-2020-12395 |
| Alpine:v3.23 | librewolf | 76.0-r0 | ALPINE-CVE-2020-12395 |
| Alpine:v3.24 | librewolf | 76.0-r0 | ALPINE-CVE-2020-12395 |
| Alpine:v3.20 | thunderbird | 68.8.0-r0 | ALPINE-CVE-2020-12395 |
| Alpine:v3.21 | thunderbird | 68.8.0-r0 | ALPINE-CVE-2020-12395 |
| Alpine:v3.22 | thunderbird | 68.8.0-r0 | ALPINE-CVE-2020-12395 |
| Alpine:v3.23 | thunderbird | 68.8.0-r0 | ALPINE-CVE-2020-12395 |
| Debian:12 | firefox-esr | 68.8.0esr-1 | DEBIAN-CVE-2020-12395 |
| Debian:13 | firefox-esr | 68.8.0esr-1 | DEBIAN-CVE-2020-12395 |
| Debian:14 | firefox-esr | 68.8.0esr-1 | DEBIAN-CVE-2020-12395 |
| Debian:12 | thunderbird | 1:68.8.0-1 | DEBIAN-CVE-2020-12395 |
| Debian:13 | thunderbird | 1:68.8.0-1 | DEBIAN-CVE-2020-12395 |
| Debian:14 | thunderbird | 1:68.8.0-1 | DEBIAN-CVE-2020-12395 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox ESR | unspecified – before 68.8 |
| Mozilla | Firefox | unspecified – before 76 |
| Mozilla | Thunderbird | unspecified – before 68.8.0 |
References
- https://www.mozilla.org/security/advisories/mfsa2020-18/ x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2020-16/ x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2020-17/ x_refsource_MISC
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1595886%2C1611482%2C1614704%2C1624098%2C1625749%2C1626382%2C1628076%2C1631508 x_refsource_MISC
- USN-4373-1 vendor-advisory, x_refsource_UBUNTU
- https://security.gentoo.org/glsa/202005-03 x_refsource_MISC
- https://security.gentoo.org/glsa/202005-04 x_refsource_MISC