CVE-2017-7358

Publication date 4 April 2017

Last updated 25 August 2025

Ubuntu priority

High

Why this priority?

Cvss 3 Severity Score

7.3 · High

Score breakdown

Description

In LightDM through 1.22.0, a directory traversal issue in debian/guest-account.sh allows local attackers to own arbitrary directory path locations and escalate privileges to root when the guest user logs out.

Read the notes from the security team

Status

Package Ubuntu Release Status
lightdm 16.10 yakkety
Fixed 1.19.5-0ubuntu1.1
16.04 LTS xenial
Fixed 1.18.3-0ubuntu1.1
14.04 LTS trusty Not in release
12.04 LTS precise
Not affected

Notes

tyhicks

This issue was reported to us by Beyond Security but they did not discover the issue. The discoverer is unknown.

Severity score breakdown

Parameter Value
Base score 7.3 · High
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

Other references

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