Vulnerability · Published Aug 5, 2021 · Assigned by mozilla
CVE-2021-29975
Medium 6.5
In plain English
A medium-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 62% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)1.0%top 38.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
Through a series of DOM manipulations, a message, over which the attacker had control of the text but not HTML or formatting, could be overlaid on top of another domain (with the new domain correctly shown in the address bar) resulting in possible user confusion. This vulnerability affects Firefox < 90.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | firefox | 90.0-r0 | ALPINE-CVE-2021-29975 |
| Alpine:v3.21 | firefox | 90.0-r0 | ALPINE-CVE-2021-29975 |
| Alpine:v3.22 | firefox | 90.0-r0 | ALPINE-CVE-2021-29975 |
| Alpine:v3.23 | firefox | 90.0-r0 | ALPINE-CVE-2021-29975 |
| Alpine:v3.21 | librewolf | 90.0-r0 | ALPINE-CVE-2021-29975 |
| Alpine:v3.22 | librewolf | 90.0-r0 | ALPINE-CVE-2021-29975 |
| Alpine:v3.23 | librewolf | 90.0-r0 | ALPINE-CVE-2021-29975 |
| Alpine:v3.24 | librewolf | 90.0-r0 | ALPINE-CVE-2021-29975 |
| Ubuntu:22.04:LTS | mozjs78 | no fix listed | UBUNTU-CVE-2021-29975 |
Affected products (as reported)
References
- https://www.mozilla.org/security/advisories/mfsa2021-28/ x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1713259 x_refsource_MISC
- GLSA-202202-03 vendor-advisory, x_refsource_GENTOO