GHSA-mhpx-3rv8-wrjm
ZendFramework potential XML eXternal Entity injection vectors
- Severity
- 9.8 / 10
- Critical · CVSS 3.1
- Exploit chance (EPSS)
- —
- No score published
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-611 Improper Restriction of XML External Entity Reference
- CWE-776 Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')
- Fix
1.12.4- Upgrade zendframework/zendframework1 to this version or later
Description
Numerous components utilizing PHP's DOMDocument, SimpleXML, and xml_parse functionality are vulnerable to two types of attacks:
- XML eXternal Entity (XXE) Injection attacks. The above mentioned extensions are insecure by default, allowing external entities to be specified by adding a specific DOCTYPE element to XML documents and strings. By exploiting this vulnerability an application may be coerced to open arbitrary files and/or TCP connections.
- XML Entity Expansion (XEE) vectors, leading to Denial of Service vectors. XEE attacks occur when the XML DOCTYPE declaration includes XML entity definitions that contain either recursive or circular references; this leads to CPU and memory consumption, making Denial of Service exploits trivial to implement.
Affected versions
Packagist
| Package | Vulnerable | Fixed in |
|---|---|---|
| zendframework/zendframework1 | >= 1.12.0, < 1.12.4 |
1.12.4 |
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
zendframework/zendframework1 Packagist → 1.12.4
- composer
composer require zendframework/zendframework1:^1.12.4
Severity breakdown
CVSS 3.1 9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Weakness
CWE-611: Improper Restriction of XML External Entity Reference
The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.
How to prevent it
- Implementation, System Configuration: Many XML parsers and validators can be configured to disable external entity expansion.
CWE-776: Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')
The product uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities.
How to prevent it
- Operation: If possible, prohibit the use of DTDs or use an XML parser that limits the expansion of recursive DTD entities.
- Implementation: Before parsing XML files with associated DTDs, scan for recursive entity declarations and do not continue parsing potentially explosive content.
References
Packages
Other links
Timeline
- Published
- Last updated by the source
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|---|---|---|
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| GHSA-2x36-qhx3-7m5f ZendFramework1 Potential SQL injection in the ORDER implementation of Zend_Db_Select | Critical | Also affects zendframework/zendframework1 |
| GHSA-9v78-h226-2rmq Zendframework potential security issue in login mechanism | High | Also affects zendframework/zendframework1 |
| GHSA-4vf6-mq7w-3hp6 Zend_Filter_StripTags vulnerable to Cross-site Scripting when comments allowed | Medium | Also affects zendframework/zendframework1 |
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