Arbitrary File Write via Archive Extraction (Zip Slip)

Affecting org.sonarsource.sonarqube:sonar-plugin-api artifact, versions [,6.7.4)

Overview

org.sonarsource.sonarqube:sonar-plugin-api provides the capability to not only show health of an application but also to highlight issues newly introduced.

Affected versions of the package are vulnerable to Arbitrary File Write via Archive Extraction (AKA "Zip Slip").

It is exploited using a specially crafted zip archive, that holds path traversal filenames. When exploited, a filename in a malicious archive is concatenated to the target extraction directory, which results in the final path ending up outside of the target folder. For instance, a zip may hold a file with a "../../file.exe" location and thus break out of the target folder. If an executable or a configuration file is overwritten with a file containing malicious code, the problem can turn into an arbitrary code execution issue quite easily.

The following is an example of a zip archive with one benign file and one malicious file. Extracting the malicous file will result in traversing out of the target folder, ending up in /root/.ssh/ overwriting the authorized_keys file:


+2018-04-15 22:04:29 ..... 19 19 good.txt

+2018-04-15 22:04:42 ..... 20 20 ../../../../../../root/.ssh/authorized_keys

Remediation

Upgrade org.sonarsource.sonarqube:sonar-plugin-api to version 6.7.4 or higher.

References

Do your applications use this vulnerable package?

CVSS Score

9.8
high severity
  • Attack Vector
    Network
  • Attack Complexity
    Low
  • Privileges Required
    None
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    High
  • Integrity
    High
  • Availability
    High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Credit
Unknown
CWE
CWE-29
Snyk ID
SNYK-JAVA-ORGSONARSOURCESONARQUBE-72656
Disclosed
04 May, 2018
Published
07 Dec, 2018