CVE-2023-1277Public exploit

Root command execution via unsanitized InstallSnap argument

Published Mar 8, 2023 · Updated Feb 28, 2025

Command injection in Ubuntu Kylin kylin-system-updater 1.4.20kord allows local users to execute commands as root via InstallSnap. The system D-Bus InstallSnap method accepts an untrusted snap-name string and passes shell metacharacters such as semicolons into privileged command execution. Any local user able to call com.kylin.systemupgrade can use this path to gain root privileges, affecting confidentiality, integrity, and availability.

CVSS severity7.8
High
EPSS probability1.80%
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 Ubuntu Kylin kylin-system-updater 1.4.20kord allows local users to execute commands as root via InstallSnap. The system D-Bus InstallSnap method accepts an untrusted snap-name string and passes shell metacharacters such as semicolons into privileged command execution. Any local user able to call com.kylin.systemupgrade can use this path to gain root privileges, affecting confidentiality, integrity, and availability.

The record

CVE
CVE-2023-1277
Published
Mar 8, 2023
Updated
Feb 28, 2025
Vendor
Ubuntu Kylin
Product
kylin-system-updater
Classifications
CWE-77, CWE-78, T1059.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.4.20kord

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Ubuntu Kylin · kylin-system-updaterversion=1.4.20kord

Published CVSS scores

6.8VulDBAV:L/AC:L/Au:S/C:C/I:C/A:C
7.8VulDBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command 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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