CVE-2017-7358
In LightDM through 1.22.0, a directory traversal issue in debian/guest-account.sh allows local...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2017-7358- CVSS 3.0
- 7.3 High
CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.9 Medium
AV:L/AC:M/Au:N/C:C/I:C/A:C - Weakness
- CWE-22
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2017-7358- Updated
- 2026-11-02
EUVDEUVD-2017-16385 No score
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.
- Record
EUVD-2017-16385- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-487j-vfqw-h49x
In LightDM through 1.22.0, a directory traversal issue in debian/guest-account.sh allows local...
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.
- Record
GHSA-487j-vfqw-h49x- CVSS 3.0
- 7.3 High
CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-22
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2017-7358- CVSS 3.0
- 7.3 High
CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2017-7358
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.
- Record
UBUNTU-CVE-2017-7358- CVSS 3.0
- 7.3 High
CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUSN-3255-1 No score
lightdm vulnerability
It was discovered that LightDM incorrectly handled home directory creation for guest users. A local attacker could use this issue to gain ownership of arbitrary directory paths and possibly gain administrative privileges.
- Record
USN-3255-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
lightdmUbuntu:16.04:LTS |
before 1.18.3-0ubuntu1.1, plus listed versions 1.16.4-0ubuntu11.17.0-0ubuntu11.17.1-0ubuntu11.17.1-0ubuntu21.17.2-0ubuntu1 Show 10 moreShow less1.17.3-0ubuntu11.17.4-0ubuntu11.17.5-0ubuntu21.17.6-0ubuntu11.18.0-0ubuntu11.18.0-0ubuntu21.18.1-0ubuntu11.18.2-0ubuntu11.18.2-0ubuntu21.18.3-0ubuntu1 |
1.18.3-0ubuntu1.1 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | LightDM (Ubuntu 16.04/16.10) - 'Guest Account' Local Privilege Escalation | 2017-04-25 |
| PoC in GitHub | JonPichel/CVE-2017-7358 | 2023-02-25 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2017-7358 is a high vulnerability (CVSS 7.3) in Lightdm Project Lightdm, published April 4, 2017. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 2.67%, the 85th percentile. Fixed in lightdm 1.18.3-0ubuntu1.1.