Vulnerability · Published Dec 8, 2021 · Assigned by mozilla
CVE-2021-43533
Medium 4.3
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 0.6% (higher than 47% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)4.3Medium
Exploit odds (30 days)0.6%top 53.1% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
When parsing internationalized domain names, high bits of the characters in the URLs were sometimes stripped, resulting in inconsistencies that could lead to user confusion or attacks such as phishing. This vulnerability affects Firefox < 94.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:22.04:LTS | firefox | 94.0+build3-0ubuntu1 | UBUNTU-CVE-2021-43533 |
Affected products (as reported)
References
- https://www.mozilla.org/security/advisories/mfsa2021-48/ x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1724233 x_refsource_MISC