CVE-2016-6252

Publication date 17 February 2017

Last updated 25 August 2025

Ubuntu priority

Why this priority?

Cvss 3 Severity Score

Score breakdown

Description

Integer overflow in shadow 4.2.1 allows local users to gain privileges via crafted input to newuidmap.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
shadow	17.04 zesty	Fixed 1:4.2-3.2ubuntu1.17.04.1
	16.10 yakkety	Fixed 1:4.2-3.2ubuntu1.16.10.1
	16.04 LTS xenial	Fixed 1:4.2-3.1ubuntu5.2
	15.10 wily	Ignored end of life
	14.04 LTS trusty	Fixed 1:4.1.5.1-1ubuntu9.4
	12.04 LTS precise	Ignored end of life

Notes

leosilva

shadow version for precise-esm and vivid/ubuntu-core doesn't use newuidmap binaries neither does any privileged access that makes this fix necessary.

Patch details

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

Package	Patch details
shadow	Vendor: https://bugzilla.suse.com/attachment.cgi?id=684679&action=diff Upstream: 1d5a926

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.8 · High

Base metrics

Parameter	Value
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality impact	High
Integrity impact	High
Availability impact	High

Scores

Parameter	Value
Base score	7.8 · High
Exploitability score	-
Impact score	-

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-3276-1
shadow vulnerabilities
5 May 2017

Other references

https://www.cve.org/CVERecord?id=CVE-2016-6252

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