CVE-2019-8955

Description

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.

Category

7.5
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 2.04% Top 20%
Vendor Advisory opensuse.org Vendor Advisory torproject.org Vendor Advisory torproject.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.securityfocus.com/bid/107136 vdb entry third party advisory
https://trac.torproject.org/projects/tor/ticket/29168 vendor advisory
https://blog.torproject.org/new-releases-tor-0402-alpha-0358-03411-and-03312 vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00013.html vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-8955?
CVE-2019-8955 has been scored as a high severity vulnerability.
How to fix CVE-2019-8955?
To fix CVE-2019-8955, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-8955 being actively exploited in the wild?
It is possible that CVE-2019-8955 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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