CVE-2024-29069

2024-07-2520:15:04

CWE-610

CWE-59

canonical

web.nvd.nist.gov

snapd

symbolic links

extraction

CVSS3

7.3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

AI Score

5.1

Confidence

High

EPSS

Percentile

9.4%

JSON

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.

Affected configurations

Nvd

Node

canonicalsnapdRange<2.62

VendorProductVersionCPE
canonicalsnapd*cpe:2.3:a:canonical:snapd:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
canonical	snapd	*	cpe:2.3:a:canonical:snapd::::::::

CNA Affected

[
  {
    "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"
  }
]