Evidence used
- No CISA KEV confirmation is currently recorded.
- The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
- EPSS is 1.68% for the current model date.
BlackTreeCVE IntelligenceDell EMC · Grails by Pivotal
High technical severity; prioritise exposed affected systems while verifying vendor guidance.
High technical severity; prioritise exposed affected systems while verifying vendor guidance.
Fix not verifiedThe Grails Resource Plugin often has to exchange URIs for resources with other internal components. Those other components will decode any URI passed to them. To protect against directory traversal the Grails Resource Plugin did the following: normalized the URI, checked the normalized URI did not step outside the appropriate root directory (e.g. the web application root), decoded the URI and checked that this did not introduce additional /../ (and similar) sequences. A bug was introduced where the Grails Resource Plugin before 1.2.13 returned the decoded version of the URI rather than the normalized version of the URI after the directory traversal check. This exposed a double decoding vulnerability. To address this issue, the Grails Resource Plugin now repeatedly decodes the URI up to three times or until decoding no longer changes the URI. If the decode limit of 3 is exceeded the URI is rejected. A side-effect of this is that the Grails Resource Plugin is unable to serve a resource that includes a '%' character in the full path to the resource. Not all environments are vulnerable because of the differences in URL resolving in different servlet containers. Applications deployed to Tomcat 8 and Jetty 9 were found not not be vulnerable, however applications deployed to JBoss EAP 6.3 / JBoss AS 7.4 and JBoss AS 7.1 were found to be vulnerable (other JBoss versions weren't tested). In certain cases JBoss returns JBoss specific vfs protocol urls from URL resolution methods (ClassLoader.getResources). The JBoss vfs URL protocol supports resolving any file on the filesystem. This made the directory traversal possible. There may be other containers, in addition to JBoss, on which this vulnerability is exposed.
The Grails Resource Plugin often has to exchange URIs for resources with other internal components. Those other components will decode any URI passed to them. To protect against directory traversal the Grails Resource Plugin did the following: normalized the URI, checked the normalized URI did not step outside the appropriate root directory (e.g. the web application root), decoded the URI and checked that this did not introduce additional /../ (and similar) sequences. A bug was introduced where the Grails Resource Plugin before 1.2.13 returned the decoded version of the URI rather than the normalized version of the URI after the directory traversal check. This exposed a double decoding vulnerability. To address this issue, the Grails Resource Plugin now repeatedly decodes the URI up to three times or until decoding no longer changes the URI. If the decode limit of 3 is exceeded the URI is rejected. A side-effect of this is that the Grails Resource Plugin is unable to serve a resource that includes a '%' character in the full path to the resource. Not all environments are vulnerable because of the differences in URL resolving in different servlet containers. Applications deployed to Tomcat 8 and Jetty 9 were found not not be vulnerable, however applications deployed to JBoss EAP 6.3 / JBoss AS 7.4 and JBoss AS 7.1 were found to be vulnerable (other JBoss versions weren't tested). In certain cases JBoss returns JBoss specific vfs protocol urls from URL resolution methods (ClassLoader.getResources). The JBoss vfs URL protocol supports resolving any file on the filesystem. This made the directory traversal possible. There may be other containers, in addition to JBoss, on which this vulnerability is exposed.
Attacker-controlled path data is not constrained to the intended directory before the application accesses a file.
An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
The Grails Resource Plugin often has to exchange URIs for resources with other internal components. Those other components will decode any URI passed to them. To protect against directory traversal the Grails Resource Plugin did the following: normalized the URI, checked the normalized URI did not step outside the appropriate root directory (e.g. the web application root), decoded the URI and checked that this did not introduce additional /../ (and similar) sequences. A bug was introduced where the Grails Resource Plugin before 1.2.13 returned the decoded version of the URI rather than the normalized version of the URI after the directory traversal check. This exposed a double decoding vulnerability. To address this issue, the Grails Resource Plugin now repeatedly decodes the URI up to three times or until decoding no longer changes the URI. If the decode limit of 3 is exceeded the URI is rejected. A side-effect of this is that the Grails Resource Plugin is unable to serve a resource that includes a '%' character in the full path to the resource. Not all environments are vulnerable because of the differences in URL resolving in different servlet containers. Applications deployed to Tomcat 8 and Jetty 9 were found not not be vulnerable, however applications deployed to JBoss EAP 6.3 / JBoss AS 7.4 and JBoss AS 7.1 were found to be vulnerable (other JBoss versions weren't tested). In certain cases JBoss returns JBoss specific vfs protocol urls from URL resolution methods (ClassLoader.getResources). The JBoss vfs URL protocol supports resolving any file on the filesystem. This made the directory traversal possible. There may be other containers, in addition to JBoss, on which this vulnerability is exposed.
Attacker-controlled path data is not constrained to the intended directory before the application accesses a file.
An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.
No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.
No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.
CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'). The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NCommon Vulnerability Scoring System 3.0: the compact vector below is decoded into plain language.
Operational remediation based on structured source evidence.
Published 19 Mar 2018 · Last source change 17 Sept 2024, 03:59 UTC · CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Core structured fields are present and their contributing authorities are shown above.