CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
EPSS
Percentile
9.4%
In snapd versions prior to 2.62, snapd failed to properly check the
destination of symbolic links when extracting a snap. The snap format
is a squashfs file-system image and so can contain symbolic links and
other file types. Various file entries within the snap squashfs image
(such as icons and desktop files etc) are directly read by snapd when
it is extracted. An attacker who could convince a user to install a
malicious snap which contained symbolic links at these paths could then
cause snapd to write out the contents of the symbolic link destination
into a world-readable directory. This in-turn could allow an unprivileged
user to gain access to privileged information.
[
{
"vendor": "Canonical",
"product": "snapd",
"platforms": [
"Linux"
],
"packageName": "snapd",
"repo": "https://github.com/snapcore/snapd/",
"modules": [
"squashfs"
],
"programFiles": [
"snap/container.go",
"snap/snapdir/snapdir.go",
"snap/squashfs/squashfs.go"
],
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "2.62",
"versionType": "custom"
}
],
"defaultStatus": "unaffected"
}
]