7.7

CVSS Score

3.1

Basic Information

CVE ID

CVE-2021-21234

GHSA ID

GHSA-p4q6-qxjx-8jgp

EPSS Score

0.99739%

CWE

CWE-22

Published

1/5/2021

Updated

2/1/2023

KEV Status

Technology

Java

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CVE-2021-21234

CVE-2021-21234:
Directory Traversal in spring-boot-actuator-logview

Impact

The nature of this library is to expose a log file directory via admin (spring boot actuator) HTTP endpoints. Both the filename to view and a base folder (relative to the logging folder root) can be specified via request parameters. While the filename parameter was checked to prevent directory traversal exploits (so that filename=../somefile would not work), the base folder parameter was not sufficiently checked, so that filename=somefile&base=../ could access a file outside the logging base directory).

Patches

The vulnerability has been patched in release 0.2.13. Any users of 0.2.12 should be able to update without any issues as there are no other changes in that release.

Workarounds

There is no workaround to fix the vulnerability other than updating or removing the dependency. However, removing read access of the user the application is run with to any directory not required for running the application can limit the impact. Additionally, access to the logview endpoint can be limited by deploying the application behind a reverse proxy.

For more information

If you have any questions or comments about this advisory:

Open an issue in the github repo

(GitHub Advisory)

7.7

CVSS Score

3.1

Basic Information

CVE ID

CVE-2021-21234

GHSA ID

GHSA-p4q6-qxjx-8jgp

EPSS Score

0.99739%

CWE

CWE-22

Published

1/5/2021

Updated

2/1/2023

KEV Status

Technology

Java

Technical Details

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
eu.hinsch:spring-boot-actuator-logview	maven	< 0.2.13	0.2.13

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stemmed from insufficient validation of the 'base' parameter in path construction. The pre-patch securityCheck method only checked for ".." in filenames but didn't properly validate the resolved path when combined with the base parameter. The list() and view() methods passed untrusted input to securityCheck before proper path resolution, enabling traversal via base parameter manipulation. The commit diff shows the fix moved securityCheck to operate on the resolved Path object and used canonical path validation.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

WAF Protection Rules

WAF Rule

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Reasoning

T** vuln*r**ility st*mm** *rom insu**i*i*nt `v*li**tion` o* t** '**s*' p*r*m*t*r in p*t* *onstru*tion. T** pr*-p*t** `s**urity****k` m*t*o* only ****k** *or ".." in `*il*n*m*s` *ut *i*n't prop*rly `v*li**t*` t** r*solv** p*t* w**n *om*in** wit* t** *

7.7

Basic Information

Concerned about an active attack path?

CVE-2021-21234: Directory Traversal in spring-boot-actuator-logview

Impact

Patches

Workarounds

For more information

7.7

Basic Information

Technical Details

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

CVE-2021-21234:
Directory Traversal in spring-boot-actuator-logview

Vulnerability Intelligence
Miggo AI