Remote Denial of Service Vulnerability in Tor Clients and Relays
CVE-2019-8955

7.5HIGH

Key Information:

Vendor

Torproject

Status
Tor
Vendor
CVE Published:
21 February 2019

What is CVE-2019-8955?

The vulnerability allows remote attackers to exhaust memory resources on Tor clients and relays, leading to denial of service. This occurs due to flaws in the KIST cell scheduler, affecting multiple versions of the Tor software. Security updates have been released to mitigate this issue, but users are advised to upgrade to the latest versions to ensure system resilience.

References

http://www.securityfocus.com/bid/107136
vdb-entryx_refsource_BID
https://trac.torproject.org/projects/tor/ticket/29168
x_refsource_MISC
https://blog.torproject.org/new-releases-tor-0402-alpha-0...
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.