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CVE-2016-6263

Published: 21 July 2016

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.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
libidn
Launchpad, Ubuntu, Debian
precise
Released (1.23-2ubuntu0.1)
trusty
Released (1.28-1ubuntu2.1)
upstream
Released (1.33-1)
wily Ignored
(end of life)
xenial
Released (1.32-3ubuntu1.1)
yakkety Not vulnerable
(1.33-1)
zesty Not vulnerable
(1.33-1)
Patches:
upstream: http://git.savannah.gnu.org/cgit/libidn.git/commit/?id=1fbee57ef3c72db2206dd87e4162108b2f425555

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H