CVE-2016-6293

Publication date 25 July 2016

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

The uloc_acceptLanguageFromHTTP function in common/uloc.cpp in International Components for Unicode (ICU) through 57.1 for C/C++ does not ensure that there is a '\0' character at the end of a certain temporary array, which allows remote attackers to cause a denial of service (out-of-bounds read) or possibly have unspecified other impact via a call with a long httpAcceptLanguage argument.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
icu	17.04 zesty	Not affected
	16.10 yakkety	Not affected
	16.04 LTS xenial	Fixed 55.1-7ubuntu0.1
	15.10 wily	Ignored end of life
	14.04 LTS trusty	Fixed 52.1-3ubuntu0.5
	12.04 LTS precise	Fixed 4.8.1.1-3ubuntu0.7

Notes

mdeslaur

see php's CVE-2016-6294

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
icu	Upstream: https://ssl.icu-project.org/trac/changeset/39109

Severity score breakdown

Parameter	Value
Base score	9.8 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H