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 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 | |
| <0.3.3.12 | ||
| >=0.3.4.8<0.3.4.11 | ||
| =0.3.4.0-alpha-dev | ||
| =0.3.4.1-alpha | ||
| =0.3.4.2-alpha | ||
| =0.3.4.3-alpha | ||
| =0.3.4.4-rc | ||
| =0.3.4.5-rc | ||
| =0.3.4.6-rc | ||
| =0.3.4.7-rc | ||
| =0.3.5.0-alpha-dev | ||
| =0.3.5.1-alpha | ||
| =0.3.5.2-alpha | ||
| =0.3.5.3-alpha | ||
| =0.3.5.4-alpha | ||
| =0.3.5.5-alpha | ||
| =0.3.5.6-rc | ||
| =0.3.5.7 | ||
| =0.4.0.1-alpha |
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Reference Links
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).
- collector/nvd-index
- agent/references
- agent/type
- collector/mitre-cve
- source/MITRE
- agent/severity
- agent/weakness
- agent/description
- agent/first-publish-date
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/last-modified-date
- agent/author
- agent/softwarecombine
- agent/tags
- agent/event
- vendor/torproject
- canonical/torproject tor
- version/torproject tor/0.3.4.8
- version/torproject tor/0.3.4.0-alpha-dev
- version/torproject tor/0.3.4.1-alpha
- version/torproject tor/0.3.4.2-alpha
- version/torproject tor/0.3.4.3-alpha
- version/torproject tor/0.3.4.4-rc
- version/torproject tor/0.3.4.5-rc
- version/torproject tor/0.3.4.6-rc
- version/torproject tor/0.3.4.7-rc
- version/torproject tor/0.3.5.0-alpha-dev
- version/torproject tor/0.3.5.1-alpha
- version/torproject tor/0.3.5.2-alpha
- version/torproject tor/0.3.5.3-alpha
- version/torproject tor/0.3.5.4-alpha
- version/torproject tor/0.3.5.5-alpha
- version/torproject tor/0.3.5.6-rc
- version/torproject tor/0.3.5.7
- version/torproject tor/0.4.0.1-alpha