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.
Does this matter?
A public exploit is published in Exploit-DB and the impact is high, while EPSS rates exploitation at 2.7%. Anyone can run this; patch or mitigate before the next change window and check exposed instances for signs of use.
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.
- CVSS 3.0
- 7.3 HIGHCVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 2.67% probability · 86th percentile
- Public exploits
- 1 in Exploit-DB · first 25 April 2017
- CISA KEV
- Not listed
- Weakness
- CWE-22
- Affected
- lightdm project/lightdm · canonical/ubuntu linux
- Source
- cve@mitre.org
EPSS 2.7% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://bazaar.launchpad.net/~lightdm-team/lightdm/trunk/revision/2478Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/97486Third Party Advisory, VDB Entry
- https://launchpad.net/bugs/1677924Third Party Advisory, VDB Entry
- https://lists.freedesktop.org/archives/lightdm/2017-April/001059.htmlThird Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/41923/
- https://www.ubuntu.com/usn/usn-3255-1/Third Party Advisory
- http://bazaar.launchpad.net/~lightdm-team/lightdm/trunk/revision/2478Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/97486Third Party Advisory, VDB Entry
- https://launchpad.net/bugs/1677924Third Party Advisory, VDB Entry
- https://lists.freedesktop.org/archives/lightdm/2017-April/001059.htmlThird Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/41923/
- https://www.ubuntu.com/usn/usn-3255-1/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.