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Gentoo Linux Security Advisory 202301-02

Gentoo Linux Security Advisory 202301-2 - Multiple vulnerabilities have been discovered in Twisted, the worst of which could result in denial of service. Versions less than 22.10.0 are affected.

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Gentoo Linux Security Advisory GLSA 202301-02


                                       https://security.gentoo.org/  

Severity: Low
Title: Twisted: Multiple Vulnerabilities
Date: January 11, 2023
Bugs: #878499, #834542, #832875
ID: 202301-02


Synopsis

Multiple vulnerabilities have been discovered in Twisted, the worst of
which could result in denial of service.

Background

Twisted is an asynchronous networking framework written in Python.

Affected packages

-------------------------------------------------------------------  
 Package              /     Vulnerable     /            Unaffected  
-------------------------------------------------------------------  

1 dev-python/twisted < 22.10.0 >= 22.10.0

Description

Multiple vulnerabilities have been discovered in Twisted. Please review
the CVE identifiers referenced below for details.

Impact

Please review the referenced CVE identifiers for details.

Workaround

There is no known workaround at this time.

Resolution

All Twisted users should upgrade to the latest version:

emerge --sync

emerge --ask --oneshot --verbose “>=dev-python/twisted-22.10.0”

References

[ 1 ] CVE-2022-21712
https://nvd.nist.gov/vuln/detail/CVE-2022-21712
[ 2 ] CVE-2022-21716
https://nvd.nist.gov/vuln/detail/CVE-2022-21716
[ 3 ] CVE-2022-39348
https://nvd.nist.gov/vuln/detail/CVE-2022-39348

Availability

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

https://security.gentoo.org/glsa/202301-02

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users’ machines is of utmost
importance to us. Any security concerns should be addressed to
[email protected] or alternatively, you may file a bug at
https://bugs.gentoo.org.

License

Copyright 2023 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.5

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When the host header does not match a configured host, `twisted.web.vhost.NameVirtualHost` will return a `NoResource` resource which renders the Host header unescaped into the 404 response allowing HTML and script injection. Example configuration: ```python from twisted.web.server import Site from twisted.web.vhost import NameVirtualHost from twisted.internet import reactor resource = NameVirtualHost() site = Site(resource) reactor.listenTCP(8080, site) reactor.run() ``` Output: ``` ❯ curl -H"Host:<h1>HELLO THERE</h1>" http://localhost:8080/ <html> <head><title>404 - No Such Resource</title></head> <body> <h1>No Such Resource</h1> <p>host b'<h1>hello there</h1>' not in vhost map</p> </body> </html> ``` This vulnerability was introduced in f49041bb67792506d85aeda9cf6157e92f8048f4 and first appeared in the 0.9.4 release.

CVE-2022-39348: Merge pull request from GHSA-vg46-2rrj-3647 · twisted/twisted@f2f5e81

Twisted is an event-based framework for internet applications. Started with version 0.9.4, when the host header does not match a configured host `twisted.web.vhost.NameVirtualHost` will return a `NoResource` resource which renders the Host header unescaped into the 404 response allowing HTML and script injection. In practice this should be very difficult to exploit as being able to modify the Host header of a normal HTTP request implies that one is already in a privileged position. This issue was fixed in version 22.10.0rc1. There are no known workarounds.

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CVE-2022-21712: Merge pull request from GHSA-92x2-jw7w-xvvx · twisted/twisted@af8fe78

twisted is an event-driven networking engine written in Python. In affected versions twisted exposes cookies and authorization headers when following cross-origin redirects. This issue is present in the `twited.web.RedirectAgent` and `twisted.web. BrowserLikeRedirectAgent` functions. Users are advised to upgrade. There are no known workarounds.

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