Vulnerability · Published Aug 5, 2021 · Assigned by mozilla
CVE-2021-29970
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 1.4% (higher than 73% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)8.8High
Exploit odds (30 days)1.4%top 26.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
A malicious webpage could have triggered a use-after-free, memory corruption, and a potentially exploitable crash. *This bug could only be triggered when accessibility was enabled.*. This vulnerability affects Thunderbird < 78.12, Firefox ESR < 78.12, and Firefox < 90.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | firefox | 90.0-r0 | ALPINE-CVE-2021-29970 |
| Alpine:v3.21 | firefox | 90.0-r0 | ALPINE-CVE-2021-29970 |
| Alpine:v3.22 | firefox | 90.0-r0 | ALPINE-CVE-2021-29970 |
| Alpine:v3.23 | firefox | 90.0-r0 | ALPINE-CVE-2021-29970 |
| Alpine:v3.20 | firefox-esr | 78.12.0-r0 | ALPINE-CVE-2021-29970 |
| Alpine:v3.21 | firefox-esr | 78.12.0-r0 | ALPINE-CVE-2021-29970 |
| Alpine:v3.22 | firefox-esr | 78.12.0-r0 | ALPINE-CVE-2021-29970 |
| Alpine:v3.23 | firefox-esr | 78.12.0-r0 | ALPINE-CVE-2021-29970 |
| Alpine:v3.21 | librewolf | 90.0-r0 | ALPINE-CVE-2021-29970 |
| Alpine:v3.22 | librewolf | 90.0-r0 | ALPINE-CVE-2021-29970 |
| Alpine:v3.23 | librewolf | 90.0-r0 | ALPINE-CVE-2021-29970 |
| Alpine:v3.24 | librewolf | 90.0-r0 | ALPINE-CVE-2021-29970 |
| Alpine:v3.20 | thunderbird | 91.3.2-r0 | ALPINE-CVE-2021-29970 |
| Alpine:v3.21 | thunderbird | 91.3.2-r0 | ALPINE-CVE-2021-29970 |
| Alpine:v3.22 | thunderbird | 91.3.2-r0 | ALPINE-CVE-2021-29970 |
| Alpine:v3.23 | thunderbird | 91.3.2-r0 | ALPINE-CVE-2021-29970 |
| Debian:12 | firefox-esr | 78.12.0esr-1 | DEBIAN-CVE-2021-29970 |
| Debian:13 | firefox-esr | 78.12.0esr-1 | DEBIAN-CVE-2021-29970 |
| Debian:14 | firefox-esr | 78.12.0esr-1 | DEBIAN-CVE-2021-29970 |
| Debian:12 | thunderbird | 1:78.12.0-1 | DEBIAN-CVE-2021-29970 |
| Debian:13 | thunderbird | 1:78.12.0-1 | DEBIAN-CVE-2021-29970 |
| Debian:14 | thunderbird | 1:78.12.0-1 | DEBIAN-CVE-2021-29970 |
| Rocky Linux:8 | firefox | 0:78.12.0-1.el8_4 | RLSA-2021:2743 |
| Rocky Linux:8 | thunderbird | 0:78.12.0-3.el8_4 | RLSA-2021:2883 |
| Ubuntu:22.04:LTS | mozjs78 | no fix listed | UBUNTU-CVE-2021-29970 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Thunderbird | unspecified – before 78.12 |
| Mozilla | Firefox ESR | unspecified – before 78.12 |
| Mozilla | Firefox | unspecified – before 90 |
References
- https://www.mozilla.org/security/advisories/mfsa2021-28/ x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2021-30/ x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2021-29/ x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1709976 x_refsource_MISC
- GLSA-202202-03 vendor-advisory, x_refsource_GENTOO
- GLSA-202208-14 vendor-advisory, x_refsource_GENTOO