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CVE-2024-29069 (GCVE-0-2024-29069)

Vulnerability from cvelistv5 – Published: 2024-07-25 19:39 – Updated: 2024-08-02 01:03

Title

snapd will follow archived symlinks when unpacking a filesystem

Summary

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.

Severity

4.8 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-07-26 13:27 UTC

CWE

CWE-610 - Externally Controlled Reference to a Resource in Another Sphere

Assigner

canonical CNA

References

1 reference

URL	Tags
https://github.com/snapcore/snapd/pull/13682

Impacted products

1 product

Vendor	Product	Version
Canonical	snapd	Affected: 0 , < 2.62 (custom)

Date Public

2024-03-14 13:47

Credits

Zeyad Gouda

Show details on NVD website

JSON

To clipboard

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CVE-2024-29068 (GCVE-0-2024-29068)

Vulnerability from cvelistv5 – Published: 2024-07-25 19:28 – Updated: 2024-08-02 01:03

Title

snapd non-regular file indefinite blocking read

Summary

In snapd versions prior to 2.62, snapd failed to properly check the file type when extracting a snap. The snap format is a squashfs file-system image and so can contain files that are non-regular files (such as pipes or sockets etc). Various file entries within the snap squashfs image (such as icons etc) are directly read by snapd when it is extracted. An attacker who could convince a user to install a malicious snap which contained non-regular files at these paths could then cause snapd to block indefinitely trying to read from such files and cause a denial of service.

Severity

5.8 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-07-25 20:21 UTC

CWE

CWE-20 - Improper Input Validation

Assigner

canonical CNA

References

2 references

URL	Tags
https://github.com/snapcore/snapd/commit/b66fee81…
https://github.com/snapcore/snapd/pull/13682

Impacted products

1 product

Vendor	Product	Version
Canonical	snapd	Affected: 0 , < 2.62 (custom)

Date Public

2024-03-14 13:47

Credits

Zeyad Gouda

Show details on NVD website

JSON

To clipboard

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CVE-2020-11934 (GCVE-0-2020-11934)

Vulnerability from cvelistv5 – Published: 2020-07-29 16:25 – Updated: 2024-09-17 04:04

Title

Sandbox escape vulnerability via snapctl user-open (xdg-open)

Summary

It was discovered that snapctl user-open allowed altering the $XDG_DATA_DIRS environment variable when calling the system xdg-open. OpenURL() in usersession/userd/launcher.go would alter $XDG_DATA_DIRS to append a path to a directory controlled by the calling snap. A malicious snap could exploit this to bypass intended access restrictions to control how the host system xdg-open script opens the URL and, for example, execute a script shipped with the snap without confinement. This issue did not affect Ubuntu Core systems. Fixed in snapd versions 2.45.1ubuntu0.2, 2.45.1+18.04.2 and 2.45.1+20.04.2.

Severity

5.9 (Medium)


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

CWE

Sandbox escape vulnerability

Assigner

canonical CNA

References

2 references

URL	Tags
https://ubuntu.com/USN-4424-1	x_refsource_CONFIRM
https://launchpad.net/bugs/1880085	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
Canonical	snapd	Affected: 2.45.1 , < 2.45.1ubuntu0.2 (custom)

Date Public

2020-05-22 00:00

Credits

James Henstridge

Show details on NVD website

JSON

To clipboard

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CVE-2020-11933 (GCVE-0-2020-11933)

Vulnerability from cvelistv5 – Published: 2020-07-29 16:25 – Updated: 2024-09-17 00:40

Title

local snapd exploit through cloud-init

Summary

cloud-init as managed by snapd on Ubuntu Core 16 and Ubuntu Core 18 devices was run without restrictions on every boot, which a physical attacker could exploit by crafting cloud-init user-data/meta-data via external media to perform arbitrary changes on the device to bypass intended security mechanisms such as full disk encryption. This issue did not affect traditional Ubuntu systems. Fixed in snapd version 2.45.2, revision 8539 and core version 2.45.2, revision 9659.

Severity

7.3 (High)


                        
                          CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

CWE

CWE-264 - Permissions, Privileges, and Access Controls

Assigner

canonical CNA

References

2 references

URL	Tags
https://launchpad.net/bugs/1879530	x_refsource_CONFIRM
https://ubuntu.com/USN-4424-1	x_refsource_CONFIRM

Impacted products

2 products

Vendor	Product	Version
Canonical	snapd	Affected: 2.45.2 , < 2.45.2, revision 8539 (custom)
Canonical	core	Affected: 2.45.2 , < 2.45.2, revision 9659 (custom)

Date Public

2020-05-19 00:00

Credits

Ian Johnson

Show details on NVD website

JSON

To clipboard

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CVE-2019-7304 (GCVE-0-2019-7304)

Vulnerability from cvelistv5 – Published: 2019-04-23 15:57 – Updated: 2024-09-16 18:38

Title

Local privilege escalation via snapd socket

Summary

Canonical snapd before version 2.37.1 incorrectly performed socket owner validation, allowing an attacker to run arbitrary commands as root. This issue affects: Canonical snapd versions prior to 2.37.1.

Severity

8.8 (High)


                        
                          CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CWE

Type confusion when performing access control check

Assigner

canonical CNA

References

3 references

URL	Tags
https://usn.ubuntu.com/3887-1/	x_refsource_MISC
https://www.exploit-db.com/exploits/46361	x_refsource_MISC
https://www.exploit-db.com/exploits/46362	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
Canonical	snapd	Affected: unspecified , < 2.37.1 (custom)

Date Public

2019-02-12 00:00

Credits

Chris Moberly

Show details on NVD website

JSON

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CVE-2019-7303 (GCVE-0-2019-7303)

Vulnerability from cvelistv5 – Published: 2019-04-23 15:57 – Updated: 2024-09-17 01:46

Title

Snapd seccomp filter TIOCSTI ioctl bypass

Summary

A vulnerability in the seccomp filters of Canonical snapd before version 2.37.4 allows a strict mode snap to insert characters into a terminal on a 64-bit host. The seccomp rules were generated to match 64-bit ioctl(2) commands on a 64-bit platform; however, the Linux kernel only uses the lower 32 bits to determine which ioctl(2) commands to run. This issue affects: Canonical snapd versions prior to 2.37.4.

Severity

5.7 (Medium)


                        
                          CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L

CWE

CWE-628

Assigner

canonical CNA

References

2 references

URL	Tags
https://usn.ubuntu.com/3917-1/	x_refsource_MISC
https://www.exploit-db.com/exploits/46594	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
Canonical	snapd	Affected: unspecified , < 2.37.4 (custom)

Date Public

2019-03-21 00:00

Credits

Jann Horn

Show details on NVD website

JSON

To clipboard

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  "cveMetadata": {
    "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
    "assignerShortName": "canonical",
    "cveId": "CVE-2019-7303",
    "datePublished": "2019-04-23T15:57:32.592Z",
    "dateReserved": "2019-02-01T00:00:00.000Z",
    "dateUpdated": "2024-09-17T01:46:16.086Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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6 vulnerabilities found for snapd by canonical

CVE-2024-29069 (GCVE-0-2024-29069)

CVE-2024-29068 (GCVE-0-2024-29068)

CVE-2020-11934 (GCVE-0-2020-11934)

CVE-2020-11933 (GCVE-0-2020-11933)

CVE-2019-7304 (GCVE-0-2019-7304)

CVE-2019-7303 (GCVE-0-2019-7303)