CVE-2017-8900

LightDM through 1.22.0, when systemd is used in Ubuntu 16.10 and 17.x, allows physically proximate attackers to bypass intended AppArmor restrictions and visit the home directories of arbitrary users by establishing a guest session.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
4.6 MEDIUM
PHYSICAL
LOW
NONE
CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 20%
VendorProductVersion
lightdm_projectlightdm
𝑥
≤ 1.22.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
lightdm
bullseye
1.26.0-7
fixed
bookworm
1.26.0-8
fixed
sid
1.32.0-6
fixed
trixie
1.32.0-6
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
lightdm
zesty
Fixed 1.22.0-0ubuntu2.1
released
yakkety
Fixed 1.19.5-0ubuntu1.2
released
xenial
not-affected
trusty
dne
References
http://www.securityfocus.com/bid/98554
https://launchpad.net/bugs/1663157
https://people.canonical.com/~ubuntu-security/cve/2017/CVE-2017-8900.html
https://www.ubuntu.com/usn/usn-3285-1/
http://www.securityfocus.com/bid/98554
https://launchpad.net/bugs/1663157
https://people.canonical.com/~ubuntu-security/cve/2017/CVE-2017-8900.html
https://www.ubuntu.com/usn/usn-3285-1/