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This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.
Description
Kirby is a content management system. A vulnerability in versions prior to 3.5.8.3, 3.6.6.3, 3.7.5.2, 3.8.4.1, and 3.9.6 only affects Kirby sites that use the `Xml` data handler (e.g. `Data::decode($string, 'xml')`) or the `Xml::parse()` method in site or plugin code. The Kirby core does not use any of the affected methods.
XML External Entities (XXE) is a little used feature in the XML markup language that allows to include data from external files in an XML structure. If the name of the external file can be controlled by an attacker, this becomes a vulnerability that can be abused for various system impacts like the disclosure of internal or confidential data that is stored on the server (arbitrary file disclosure) or to perform network requests on behalf of the server (server-side request forgery, SSRF).
Kirby's `Xml::parse()` method used PHP's `LIBXML_NOENT` constant, which enabled the processing of XML external entities during the parsing operation. The `Xml::parse()` method is used in the `Xml` data handler (e.g. `Data::decode($string, 'xml')`). Both the vulnerable method and the data handler are not used in the Kirby core. However they may be used in site or plugin code, e.g. to parse RSS feeds or other XML files. If those files are of an external origin (e.g. uploaded by a user or retrieved from an external URL), attackers may be able to include an external entity in the XML file that will then be processed in the parsing process. Kirby sites that don't use XML parsing in site or plugin code are *not* affected.
The problem has been patched in Kirby 3.5.8.3, 3.6.6.3, 3.7.5.2, 3.8.4.1, and 3.9.6. In all of the mentioned releases, the maintainers have removed the `LIBXML_NOENT` constant as processing of external entities is out of scope of the parsing logic. This protects all uses of the method against the described vulnerability.
Metrics
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OR
*cpe:2.3:a:getkirby:kirby:*:*:*:*:*:*:*:* versions from (including) 3.5.0 up to (excluding) 3.5.8.3
*cpe:2.3:a:getkirby:kirby:*:*:*:*:*:*:*:* versions from (including) 3.6.0 up to (excluding) 3.6.6.3
*cpe:2.3:a:getkirby:kirby:*:*:*:*:*:*:*:* versions from (including) 3.7.0 up to (excluding) 3.7.5.2
*cpe:2.3:a:getkirby:kirby:*:*:*:*:*:*:*:* versions from (including) 3.8.0 up to (excluding) 3.8.4.1
*cpe:2.3:a:getkirby:kirby:*:*:*:*:*:*:*:* versions from (including) 3.9.0 up to (excluding) 3.9.6
Changed
Reference Type
https://github.com/getkirby/kirby/commit/277b05662d2b67386f0a0f18323cf68b30e86387 No Types Assigned
https://github.com/getkirby/kirby/commit/277b05662d2b67386f0a0f18323cf68b30e86387 Patch, Third Party Advisory
Changed
Reference Type
https://github.com/getkirby/kirby/releases/tag/3.5.8.3 No Types Assigned
https://github.com/getkirby/kirby/releases/tag/3.5.8.3 Third Party Advisory
Changed
Reference Type
https://github.com/getkirby/kirby/releases/tag/3.6.6.3 No Types Assigned
https://github.com/getkirby/kirby/releases/tag/3.6.6.3 Third Party Advisory
Changed
Reference Type
https://github.com/getkirby/kirby/releases/tag/3.7.5.2 No Types Assigned
https://github.com/getkirby/kirby/releases/tag/3.7.5.2 Third Party Advisory
Changed
Reference Type
https://github.com/getkirby/kirby/releases/tag/3.8.4.1 No Types Assigned
https://github.com/getkirby/kirby/releases/tag/3.8.4.1 Third Party Advisory
Changed
Reference Type
https://github.com/getkirby/kirby/releases/tag/3.9.6 No Types Assigned
https://github.com/getkirby/kirby/releases/tag/3.9.6 Third Party Advisory
Changed
Reference Type
https://github.com/getkirby/kirby/security/advisories/GHSA-q386-w6fg-gmgp No Types Assigned
https://github.com/getkirby/kirby/security/advisories/GHSA-q386-w6fg-gmgp Third Party Advisory
CVE Modified by GitHub, Inc.7/27/2023 12:15:10 PM
Action
Type
Old Value
New Value
Changed
Description
Kirby is a content management system. A vulnerability in versions prior to 3.5.8.3, 3.6.6.3, 3.7.5.2, 3.8.4.1, and 3.9.6 only affects Kirby sites that use the `Xml` data handler (e.g. `Data::decode($string, 'xml')`) or the `Xml::parse()` method in site or plugin code. The Kirby core does not use any of the affected methods.
XML External Entities (XXE) is a little used feature in the XML markup language that allows to include data from external files in an XML structure. If the name of the external file can be controlled by an attacker, this becomes a vulnerability that can be abused for various system impacts like the disclosure of internal or confidential data that is stored on the server (arbitrary file disclosure) or to perform network requests on behalf of the server (server-side request forgery, SSRF).
Kirby's `Xml::parse()` method used PHP's `LIBXML_NOENT` constant, which enabled the processing of XML external entities during the parsing operation. The `Xml::parse()` method is used in the `Xml` data handler (e.g. `Data::decode($string, 'xml')`). Both the vulnerable method and the data handler are not used in the Kirby core. However they may be used in site or plugin code, e.g. to parse RSS feeds or other XML files. If those files are of an external origin (e.g. uploaded by a user or retrieved from an external URL), attackers may be able to include an external entity in the XML file that will then be processed in the parsing process. Kirby sites that don't use XML parsing in site or plugin code are *not* affected.
The problem has been patched in Kirby 3.5.8.3, 3.6.6.3, 3.7.5.2, 3.8.4.1, and Kirby 3.9.6. In all of the mentioned releases, the maintainers have removed the `LIBXML_NOENT` constant as processing of external entities is out of scope of the parsing logic. This protects all uses of the method against the described vulnerability.
Kirby is a content management system. A vulnerability in versions prior to 3.5.8.3, 3.6.6.3, 3.7.5.2, 3.8.4.1, and 3.9.6 only affects Kirby sites that use the `Xml` data handler (e.g. `Data::decode($string, 'xml')`) or the `Xml::parse()` method in site or plugin code. The Kirby core does not use any of the affected methods.
XML External Entities (XXE) is a little used feature in the XML markup language that allows to include data from external files in an XML structure. If the name of the external file can be controlled by an attacker, this becomes a vulnerability that can be abused for various system impacts like the disclosure of internal or confidential data that is stored on the server (arbitrary file disclosure) or to perform network requests on behalf of the server (server-side request forgery, SSRF).
Kirby's `Xml::parse()` method used PHP's `LIBXML_NOENT` constant, which enabled the processing of XML external entities during the parsing operation. The `Xml::parse()` method is used in the `Xml` data handler (e.g. `Data::decode($string, 'xml')`). Both the vulnerable method and the data handler are not used in the Kirby core. However they may be used in site or plugin code, e.g. to parse RSS feeds or other XML files. If those files are of an external origin (e.g. uploaded by a user or retrieved from an external URL), attackers may be able to include an external entity in the XML file that will then be processed in the parsing process. Kirby sites that don't use XML parsing in site or plugin code are *not* affected.
The problem has been patched in Kirby 3.5.8.3, 3.6.6.3, 3.7.5.2, 3.8.4.1, and 3.9.6. In all of the mentioned releases, the maintainers have removed the `LIBXML_NOENT` constant as processing of external entities is out of scope of the parsing logic. This protects all uses of the method against the described vulnerability.
Quick Info
CVE Dictionary Entry: CVE-2023-38490 NVD
Published Date: 07/27/2023 NVD
Last Modified: 11/21/2024
Source: GitHub, Inc.
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