Vulnerability · Published Mar 25, 2020 · Assigned by mozilla
CVE-2020-6807
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 1.5% (higher than 74% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)8.8High
Exploit odds (30 days)1.5%top 26.1% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
When a device was changed while a stream was about to be destroyed, the <code>stream-reinit</code> task may have been executed after the stream was destroyed, causing a use-after-free and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.6, Firefox < 74, Firefox < ESR68.6, and Firefox ESR < 68.6.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | firefox | 74.0-r0 | ALPINE-CVE-2020-6807 |
| Alpine:v3.21 | firefox | 74.0-r0 | ALPINE-CVE-2020-6807 |
| Alpine:v3.22 | firefox | 74.0-r0 | ALPINE-CVE-2020-6807 |
| Alpine:v3.23 | firefox | 74.0-r0 | ALPINE-CVE-2020-6807 |
| Alpine:v3.20 | firefox-esr | 68.6.0-r0 | ALPINE-CVE-2020-6807 |
| Alpine:v3.21 | firefox-esr | 68.6.0-r0 | ALPINE-CVE-2020-6807 |
| Alpine:v3.22 | firefox-esr | 68.6.0-r0 | ALPINE-CVE-2020-6807 |
| Alpine:v3.23 | firefox-esr | 68.6.0-r0 | ALPINE-CVE-2020-6807 |
| Alpine:v3.21 | librewolf | 74.0-r0 | ALPINE-CVE-2020-6807 |
| Alpine:v3.22 | librewolf | 74.0-r0 | ALPINE-CVE-2020-6807 |
| Alpine:v3.23 | librewolf | 74.0-r0 | ALPINE-CVE-2020-6807 |
| Alpine:v3.24 | librewolf | 74.0-r0 | ALPINE-CVE-2020-6807 |
| Alpine:v3.20 | thunderbird | 68.6.0-r0 | ALPINE-CVE-2020-6807 |
| Alpine:v3.21 | thunderbird | 68.6.0-r0 | ALPINE-CVE-2020-6807 |
| Alpine:v3.22 | thunderbird | 68.6.0-r0 | ALPINE-CVE-2020-6807 |
| Alpine:v3.23 | thunderbird | 68.6.0-r0 | ALPINE-CVE-2020-6807 |
| Debian:12 | firefox-esr | 68.6.0esr-1 | DEBIAN-CVE-2020-6807 |
| Debian:13 | firefox-esr | 68.6.0esr-1 | DEBIAN-CVE-2020-6807 |
| Debian:14 | firefox-esr | 68.6.0esr-1 | DEBIAN-CVE-2020-6807 |
| Debian:12 | thunderbird | 1:68.6.0-1 | DEBIAN-CVE-2020-6807 |
| Debian:13 | thunderbird | 1:68.6.0-1 | DEBIAN-CVE-2020-6807 |
| Debian:14 | thunderbird | 1:68.6.0-1 | DEBIAN-CVE-2020-6807 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Thunderbird | unspecified – before 68.6 |
| Mozilla | Firefox | unspecified – before 74unspecified – before ESR68.6 |
| Mozilla | Firefox ESR | unspecified – before 68.6 |
References
- https://www.mozilla.org/security/advisories/mfsa2020-08/ x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2020-10/ x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2020-09/ x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1614971 x_refsource_MISC
- USN-4328-1 vendor-advisory, x_refsource_UBUNTU
- USN-4335-1 vendor-advisory, x_refsource_UBUNTU