CVE-2022-4885Network attack vector

Host file writes via uncanonicalized inode paths

Published Jan 11, 2023 · Updated Aug 3, 2024

Path traversal in sviehb Jefferson 0.1 through 0.3 allows context-dependent attackers to write files outside the extraction directory. The dump_fs function joins inode-derived names to the extraction target without first canonicalizing the result or verifying that it remains beneath that target. Exploitation requires Jefferson to process a crafted JFFS2 image, and resulting writes are limited by the filesystem permissions of the Jefferson process.

CVSS severity7.5
High
EPSS probability0.75%
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 sviehb Jefferson 0.1 through 0.3 allows context-dependent attackers to write files outside the extraction directory. The dump_fs function joins inode-derived names to the extraction target without first canonicalizing the result or verifying that it remains beneath that target. Exploitation requires Jefferson to process a crafted JFFS2 image, and resulting writes are limited by the filesystem permissions of the Jefferson process.

The record

CVE
CVE-2022-4885
Published
Jan 11, 2023
Updated
Aug 3, 2024
Vendor
sviehb
Product
Jefferson
Classifications
CWE-22, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

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

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

sviehb · Jeffersonversion=0.1; version=0.2; version=0.3

Published CVSS scores

5.9NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.1VulDBAV:N/AC:H/Au:N/C:P/I:P/A:P
5.0VulDBCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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