CVE-2016-6263
Summary
| CVE | CVE-2016-6263 |
|---|---|
| State | PUBLISHED |
| Assigner | mitre |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2016-09-07 20:59:06 UTC |
| Updated | 2026-05-06 22:30:45 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.0 7.5 HIGH from [email protected]
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.020000000 probability, percentile 0.837590000 (date 2026-05-06)
Problem Types: CWE-125 | n/a
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.0 | [email protected] | Primary | 7.5 | HIGH | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 2.0 | [email protected] | Primary | 5 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
CVSS v3.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v2.0 Breakdown
Access Vector
NetworkAccess Complexity
LowAuthentication
NoneConfidentiality
NoneIntegrity
NoneAvailability
PartialAV:N/AC:L/Au:N/C:N/I:N/A:P
NVD Known Affected Configurations (CPE 2.3)
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| oss-security - Re: CVE request: multiple issues fixed in GNU libidn 1.33 | af854a3a-2127-422b-91ae-364da2661108 | www.openwall.com | Mailing List, Third Party Advisory |
| glibc: Multiple vulnerabilities (GLSA 201908-06) — Gentoo security | af854a3a-2127-422b-91ae-364da2661108 | security.gentoo.org | |
| Libidn 1.33 released | af854a3a-2127-422b-91ae-364da2661108 | lists.gnu.org | Vendor Advisory |
| lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e69... | af854a3a-2127-422b-91ae-364da2661108 | lists.apache.org | |
| openSUSE-SU-2016:2135-1: moderate: Security update for libidn | af854a3a-2127-422b-91ae-364da2661108 | lists.opensuse.org | Third Party Advisory |
| Debian -- Security Information -- DSA-3658-1 libidn | af854a3a-2127-422b-91ae-364da2661108 | www.debian.org | |
| libidn.git - GNU libidn | af854a3a-2127-422b-91ae-364da2661108 | git.savannah.gnu.org | Issue Tracking, Patch |
| lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450... | af854a3a-2127-422b-91ae-364da2661108 | lists.apache.org | |
| GNU Libidn Multiple Remote Security Vulnerabilities | af854a3a-2127-422b-91ae-364da2661108 | www.securityfocus.com | Third Party Advisory, VDB Entry |
| openSUSE-SU-2016:1924-1: moderate: Security update for libidn | af854a3a-2127-422b-91ae-364da2661108 | lists.opensuse.org | Third Party Advisory |
| oss-security - CVE request: multiple issues fixed in GNU libidn 1.33 | af854a3a-2127-422b-91ae-364da2661108 | www.openwall.com | Mailing List, Third Party Advisory |
| USN-3068-1: Libidn vulnerabilities | Ubuntu | af854a3a-2127-422b-91ae-364da2661108 | www.ubuntu.com | Third Party Advisory |
| Pony Mail! | MITRE | lists.apache.org | |
| Pony Mail! | MITRE | lists.apache.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.