First published: Thu Feb 21 2019(Updated: )
In Tor before 0.3.3.12, 0.3.4.x before 0.3.4.11, 0.3.5.x before 0.3.5.8, and 0.4.x before 0.4.0.2-alpha, remote denial of service against Tor clients and relays can occur via memory exhaustion in the KIST cell scheduler.
Credit: cve@mitre.org
Affected Software | Affected Version | How to fix |
---|---|---|
Torproject Tor | <0.3.3.12 | |
Torproject Tor | >=0.3.4.8<0.3.4.11 | |
Torproject Tor | =0.3.4.0-alpha-dev | |
Torproject Tor | =0.3.4.1-alpha | |
Torproject Tor | =0.3.4.2-alpha | |
Torproject Tor | =0.3.4.3-alpha | |
Torproject Tor | =0.3.4.4-rc | |
Torproject Tor | =0.3.4.5-rc | |
Torproject Tor | =0.3.4.6-rc | |
Torproject Tor | =0.3.4.7-rc | |
Torproject Tor | =0.3.5.0-alpha-dev | |
Torproject Tor | =0.3.5.1-alpha | |
Torproject Tor | =0.3.5.2-alpha | |
Torproject Tor | =0.3.5.3-alpha | |
Torproject Tor | =0.3.5.4-alpha | |
Torproject Tor | =0.3.5.5-alpha | |
Torproject Tor | =0.3.5.6-rc | |
Torproject Tor | =0.3.5.7 | |
Torproject Tor | =0.4.0.1-alpha |
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The vulnerability ID for this vulnerability is CVE-2019-8955.
The severity of CVE-2019-8955 is high with a CVSS score of 7.5.
Tor versions before 0.3.3.12, 0.3.4.x before 0.3.4.11, 0.3.5.x before 0.3.5.8, and 0.4.x before 0.4.0.2-alpha are affected by CVE-2019-8955.
A remote denial of service can occur via memory exhaustion in the KIST cell scheduler.
You can find more information about CVE-2019-8955 at the following references: [http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00013.html](http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00013.html), [http://www.securityfocus.com/bid/107136](http://www.securityfocus.com/bid/107136), [https://blog.torproject.org/new-releases-tor-0402-alpha-0358-03411-and-03312](https://blog.torproject.org/new-releases-tor-0402-alpha-0358-03411-and-03312).