Vulnerability · Published Aug 5, 2021 · Assigned by mozilla
CVE-2021-29972
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 35.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
A use-after-free vulnerability was found via testing, and traced to an out-of-date Cairo library. Updating the library resolved the issue, and may have remediated other, unknown security vulnerabilities as well. This vulnerability affects Firefox < 90.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | firefox | 90.0-r0 | ALPINE-CVE-2021-29972 |
| Alpine:v3.21 | firefox | 90.0-r0 | ALPINE-CVE-2021-29972 |
| Alpine:v3.22 | firefox | 90.0-r0 | ALPINE-CVE-2021-29972 |
| Alpine:v3.23 | firefox | 90.0-r0 | ALPINE-CVE-2021-29972 |
| Alpine:v3.21 | librewolf | 90.0-r0 | ALPINE-CVE-2021-29972 |
| Alpine:v3.22 | librewolf | 90.0-r0 | ALPINE-CVE-2021-29972 |
| Alpine:v3.23 | librewolf | 90.0-r0 | ALPINE-CVE-2021-29972 |
| Alpine:v3.24 | librewolf | 90.0-r0 | ALPINE-CVE-2021-29972 |
| Ubuntu:22.04:LTS | mozjs78 | no fix listed | UBUNTU-CVE-2021-29972 |
Affected products (as reported)
References
- https://www.mozilla.org/security/advisories/mfsa2021-28/ x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1696816 x_refsource_MISC
- GLSA-202202-03 vendor-advisory, x_refsource_GENTOO