CVE-2017-10600

Publication date 11 July 2017

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

ubuntu-image 1.0 before 2017-07-07, when invoked as non-root, creates files in the resulting image with the uid of the invoking user. When the resulting image is booted, a local attacker with the same uid as the image creator has unintended access to cloud-init and snapd directories.

From the Ubuntu Security Team

ubuntu-image 1.0 when invoked as non-root on systems with e2fsprogs >= 1.43 creates file permissions in the resulting image with the UID of the invoking user. When the resulting image is booted, a local attacker with the same UID as the image creator can alter installed snap packages and signatures to downgrade or potentially replace snap packages.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
ubuntu-image	17.04 zesty	Fixed 1.0+17.04ubuntu1.1
	16.10 yakkety	Fixed 1.0+16.10ubuntu1.1
	16.04 LTS xenial	Ignored
	14.04 LTS trusty	Not in release

Notes

jdstrand

this issue only affects Ubuntu Core and not snapd on Ubuntu classic while snapd is not affected, an updated snapd will attempt to correct permissions on refresh. Because this only affects Ubuntu Core, that update will happen via the snap store and not included as a separate security update for the Ubuntu archive. Ubuntu 16.04 LTS has e2fsprogs 1.42.13

Patch details

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

Package	Patch details
ubuntu-image	Upstream: https://github.com/CanonicalLtd/ubuntu-image/pull/135

Severity score breakdown

Parameter	Value
Base score	5.9 · Medium
Attack vector	Local
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity impact	Low
Availability impact	Low
Vector	CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L