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CVE-2019-8955

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Date: February 21, 2019

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.

Language: C

Severity Score

Related Resources (9)

http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00013.html
http://www.securityfocus.com/bid/107136
https://blog.torproject.org/new-releases-tor-0402-alpha-0358-03411-and-03312
https://security-tracker.debian.org/tracker/CVE-2019-8955
https://nvd.nist.gov/vuln/detail/CVE-2019-8955
https://security.alpinelinux.org/vuln/CVE-2019-8955
https://trac.torproject.org/projects/tor/ticket/29168
https://people.canonical.com/~ubuntu-security/cve/CVE-2019-8955
https://www.mend.io/vulnerability-database/CVE-2019-8955

Severity Score

Weakness Type (CWE)

Uncontrolled Resource Consumption ('Resource Exhaustion')

CWE-400

Allocation of Resources Without Limits or Throttling

CWE-770

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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