Vulnerability · Published Oct 1, 2020 · Assigned by mozilla
CVE-2020-15669
High 8.8
In plain English
A high-severity security flaw in Firefox ESR from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 66% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)8.8High
Exploit odds (30 days)1.1%top 33.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
When aborting an operation, such as a fetch, an abort signal may be deleted while alerting the objects to be notified. This results in a use-after-free and we presume that with enough effort it could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 68.12 and Thunderbird < 68.12.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | firefox-esr | 68.12.0esr-1 | DEBIAN-CVE-2020-15669 |
| Debian:13 | firefox-esr | 68.12.0esr-1 | DEBIAN-CVE-2020-15669 |
| Debian:14 | firefox-esr | 68.12.0esr-1 | DEBIAN-CVE-2020-15669 |
| Debian:12 | thunderbird | 1:68.12.0-1 | DEBIAN-CVE-2020-15669 |
| Debian:13 | thunderbird | 1:68.12.0-1 | DEBIAN-CVE-2020-15669 |
| Debian:14 | thunderbird | 1:68.12.0-1 | DEBIAN-CVE-2020-15669 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox ESR | unspecified – before 68.12 |
| Mozilla | Thunderbird | unspecified – before 68.12 |
References
- https://www.mozilla.org/security/advisories/mfsa2020-40/ x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2020-37/ x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1656957 x_refsource_MISC