CVE-2023-1523Public exploit

Sandbox escape via unrestricted TIOCLINUX ioctl

Published Sep 1, 2023 · Updated Oct 1, 2024

Command injection in Canonical snapd allows attackers to execute arbitrary commands outside a snap sandbox through a virtual console. The snap seccomp policy permits ioctl calls with TIOCLINUX, enabling a malicious snap to select crafted terminal text and paste it into the controlling terminal's input queue. The commands execute in the surrounding shell after the snap exits; graphical terminal emulators are not affected.

CVSS severity10.0
Critical
EPSS probability1.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in Canonical snapd allows attackers to execute arbitrary commands outside a snap sandbox through a virtual console. The snap seccomp policy permits ioctl calls with TIOCLINUX, enabling a malicious snap to select crafted terminal text and paste it into the controlling terminal's input queue. The commands execute in the surrounding shell after the snap exits; graphical terminal emulators are not affected.

The record

CVE
CVE-2023-1523
Published
Sep 1, 2023
Updated
Oct 1, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-74, T1059.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

10.0Canonical Ltd.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1059.004Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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