CVE-2022-4572

Arbitrary file overwrite via untrusted UBIFS node names

Published Dec 17, 2022 · Updated Apr 15, 2025

Path traversal in UBI Reader 0.8.0 and earlier allows attackers to overwrite files via a maliciously crafted UBIFS image. The extract_dents path builder trusts dent_node.name, joins it to the extraction directory, and writes node content without first containing the resolved path. A user must run ubireader_extract_files on the image, and writes are limited to locations accessible to that process; elevated execution increases the impact.

CVSS severity5.4
Medium
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in UBI Reader 0.8.0 and earlier allows attackers to overwrite files via a maliciously crafted UBIFS image. The extract_dents path builder trusts dent_node.name, joins it to the extraction directory, and writes node content without first containing the resolved path. A user must run ubireader_extract_files on the image, and writes are limited to locations accessible to that process; elevated execution increases the impact.

The record

CVE
CVE-2022-4572
Published
Dec 17, 2022
Updated
Apr 15, 2025
Vendor
UBI Reader Project
Product
UBI Reader
Classifications
CWE-22, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 17, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 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=0.1
  2. Affected versionversion=0.2
  3. Affected versionversion=0.3
  4. Affected versionversion=0.4
  5. Affected versionversion=0.5
  6. Affected versionversion=0.6
  7. Affected versionversion=0.7
  8. Affected versionversion=0.8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

UBI Reader Project · UBI Readerversion=0.1; version=0.2; version=0.3; version=0.4; version=0.5; version=0.6; version=0.7; version=0.8

Published CVSS scores

6.9GitHubCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
5.4VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

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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