Denial of Service Vulnerability in aioxmpp Package (CVE-2019-1000007)
Summary
CVE-2019-1000007: aioxmpp version 0.10.2 and earlier contains a Improper Handling of Structural Elements vulnerability in Stanza Parser, rollback during error processing, aioxmpp.xso.model.guard function that can result in Denial of Servi... Affects python-aioxmpp across 2 version ranges.
< 0.10.3-1
< 46e6bdd7708a5c025ca0fd09f22d8419b58edaaf
Fixed in 0.10.3-1. How to fix ↓
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Background
aioxmpp is a Python library designed for XMPP (Extensible Messaging and Presence Protocol) applications, enabling developers to create real-time communication applications. The library is known for its asynchronous capabilities, making it suitable for high-performance applications. However, versions 0.10.2 and earlier are susceptible to a vulnerability that compromises the stability of applications using this library.
Vulnerability Detail
The vulnerability identified as CVE-2019-1000007 is an Improper Handling of Structural Elements issue in the Stanza Parser of the aioxmpp library. This flaw occurs during error processing in the aioxmpp.xso.model.guard function, which can lead to Denial of Service (DoS) attacks. An attacker can exploit this vulnerability by sending a crafted stanza to an application that utilizes the vulnerable components, potentially causing the application to reconnect and lose data. This vulnerability is particularly concerning as it can be exploited remotely, impacting the reliability of applications built on this library.
How To Fix
Minimum fixed version
0.10.3-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade python-aioxmppTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If upgrading is not immediately possible, consider implementing input validation to filter out potentially harmful stanzas before they are processed by the aioxmpp library. This can help reduce the risk of exploitation until an upgrade can be performed.
Conclusion
The CVE-2019-1000007 vulnerability in the aioxmpp package poses a significant risk of Denial of Service attacks due to improper handling of structural elements. Users are strongly advised to upgrade to version 0.10.3 or later to ensure their applications remain secure. Additionally, utilizing tools like Vulert can help monitor for such vulnerabilities effectively.
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FAQ
CVE-2019-1000007 is a vulnerability in the aioxmpp library that can lead to Denial of Service attacks due to improper handling of structural elements in the Stanza Parser.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
Exploitation of this vulnerability can cause applications to reconnect unexpectedly, potentially leading to data loss and service interruptions.
Yes, upgrading to aioxmpp version 0.10.3 or later will resolve this vulnerability.
Vulert is a service that monitors and alerts for open-source vulnerabilities in software using a manifest file like package-lock.json, providing real-time insights into potential risks.
References
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