Local file access and overwrite via temp-directory collision
Published May 27, 2021 · Updated Aug 3, 2024
Privilege escalation in Spring Framework 5.2.0 through 5.2.14 and 5.3.0 through 5.3.6 allows local users to access or overwrite files. WebFlux's SynchronossPartHttpMessageReader and DefaultPartHttpMessageReader use temporary storage directories that can collide across reader instances. A locally authenticated user who recreates the directory can read or modify uploaded files or replace arbitrary files with multipart data.
Summary
What happened
Privilege escalation in Spring Framework 5.2.0 through 5.2.14 and 5.3.0 through 5.3.6 allows local users to access or overwrite files. WebFlux's SynchronossPartHttpMessageReader and DefaultPartHttpMessageReader use temporary storage directories that can collide across reader instances. A locally authenticated user who recreates the directory can read or modify uploaded files or replace arbitrary files with multipart data.
The record
- CVE
- CVE-2021-22118
- Published
- May 27, 2021
- Updated
- Aug 3, 2024
- Vendor
- Spring
- Product
- Spring Framework
- Classifications
- CWE-668, CWE-269, T1005, T1565.001
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- May 27, 2021CVE publishedPublication date reported by the CVE source.
- 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.
- Affected versionversion=Spring Framework versions 5.2.x prior to 5.2.15 and versions 5.3.x prior to 5.3.7
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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