CVE-2016-6263
7.5
HIGH
CVSS 3.1
EPSS 3.0%
Description
The stringprep_utf8_nfkc_normalize function in lib/nfkc.c in libidn before 1.33 allows context-dependent attackers to cause a denial of service (out-of-bounds read and crash) via crafted UTF-8 data.
How to fix CVE-2016-6263
To remediate CVE-2016-6263, upgrade the affected package to a fixed version below.
- Alpine/libidn—upgrade to 1.33-r0 or later
- Debian/libidn—upgrade to 1.33-1 or later
Is CVE-2016-6263 being exploited?
Low — EPSS is 3.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 1.33-r0
- from 0, < 1.33-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |