5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.02 Low
EPSS
Percentile
88.8%
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.
blog.torproject.org/new-releases-tor-0402-alpha-0358-03411-and-03312
launchpad.net/bugs/cve/CVE-2019-8955
nvd.nist.gov/vuln/detail/CVE-2019-8955
security-tracker.debian.org/tracker/CVE-2019-8955
trac.torproject.org/projects/tor/ticket/29168
ubuntu.com/security/notices/USN-5036-1
www.cve.org/CVERecord?id=CVE-2019-8955
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.02 Low
EPSS
Percentile
88.8%