GHSA-cm59-pr5q-cw85

Опубликовано: 11 июл. 2022

Источник: github

Github: Прошло ревью

CVSS3: 7.8

Описание

Temporary Directory Hijacking to Local Privilege Escalation Vulnerability in org.springframework.boot:spring-boot

spring-boot versions prior to version v2.2.11.RELEASE was vulnerable to temporary directory hijacking. This vulnerability impacted the org.springframework.boot.web.server.AbstractConfigurableWebServerFactory.createTempDir method.

The vulnerable method is used to create a work directory for embedded web servers such as Tomcat and Jetty. The directory contains configuration files, JSP/class files, etc. If a local attacker got the permission to write in this directory, they could completely take over the application (ie. local privilege escalation).

Impact Location

This vulnerability impacted the following source location:

/** * Return the absolute temp dir for given web server. * @param prefix server name * @return the temp dir for given server. */ protected final File createTempDir(String prefix) { try { File tempDir = File.createTempFile(prefix + ".", "." + getPort()); tempDir.delete(); tempDir.mkdir(); tempDir.deleteOnExit(); return tempDir; }

- https://github.com/spring-projects/spring-boot/blob/ce70e7d768977242a8ea6f93188388f273be5851/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/server/AbstractConfigurableWebServerFactory.java#L165-L177

This vulnerability exists because File.mkdir returns false when it fails to create a directory, it does not throw an exception. As such, the following race condition exists:

File tmpDir =File.createTempFile(prefix + ".", "." + getPort()); // Attacker knows the full path of the file that will be generated // delete the file that was created tmpDir.delete(); // Attacker sees file is deleted and begins a race to create their own directory before Jetty. // and make a directory of the same name // SECURITY VULNERABILITY: Race Condition! - Attacker beats java code and now owns this directory tmpDir.mkdirs(); // This method returns 'false' because it was unable to create the directory. No exception is thrown. // Attacker can write any new files to this directory that they wish. // Attacker can read any files created by this process.

Prerequisites

This vulnerability impacts Unix-like systems, and very old versions of Mac OSX and Windows as they all share the system temporary directory between all users.

Patches

This vulnerability was inadvertently fixed as a part of this patch: https://github.com/spring-projects/spring-boot/commit/667ccdae84822072f9ea1a27ed5c77964c71002d

This vulnerability is patched in versions v2.2.11.RELEASE or later.

Workarounds

Setting the java.io.tmpdir system environment variable to a directory that is exclusively owned by the executing user will fix this vulnerability for all operating systems.

Ссылки

Пакеты

Наименование

org.springframework.boot:spring-boot

maven

Затронутые версииВерсия исправления

<= 2.2.10.RELEASE

2.2.11.RELEASE

EPSS

Процентиль: 74%

0.00826

Низкий

7.8 High

CVSS3

CVE ID

CVE-2022-27772

Дефекты

CWE-377

CWE-379

CWE-668

Связанные уязвимости

CVE-2022-27772

CVSS3: 7.8

nvd

почти 4 года назад

spring-boot versions prior to version v2.2.11.RELEASE was vulnerable to temporary directory hijacking. This vulnerability impacted the org.springframework.boot.web.server.AbstractConfigurableWebServerFactory.createTempDir method. NOTE: This vulnerability only affects products and/or versions that are no longer supported by the maintainer

EPSS

Процентиль: 74%

0.00826

Низкий

7.8 High

CVSS3

CVE ID

CVE-2022-27772

Дефекты

CWE-377

CWE-379

CWE-668