7.5
CWE
770
Advisory Published
Updated

CVE-2019-8955

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 SoftwareAffected VersionHow 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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Frequently Asked Questions

  • What is the vulnerability ID for this vulnerability?

    The vulnerability ID for this vulnerability is CVE-2019-8955.

  • What is the severity of CVE-2019-8955?

    The severity of CVE-2019-8955 is high with a CVSS score of 7.5.

  • Which software versions are affected by CVE-2019-8955?

    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.

  • How can a remote denial of service occur with CVE-2019-8955?

    A remote denial of service can occur via memory exhaustion in the KIST cell scheduler.

  • Where can I find more information about CVE-2019-8955?

    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).

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