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
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
62.2%
An issue was discovered in Tor before 0.4.6.5, aka TROVE-2021-005. Hashing
is mishandled for certain retrieval of circuit data. Consequently. an
attacker can trigger the use of an attacker-chosen circuit ID to cause
algorithm inefficiency.
blog.torproject.org/node/2041
gitlab.torproject.org/tpo/core/tor/-/commit/4c06c619faceb5d158a725d97fda45cadb2cf9c9
launchpad.net/bugs/cve/CVE-2021-34549
nvd.nist.gov/vuln/detail/CVE-2021-34549
security-tracker.debian.org/tracker/CVE-2021-34549
ubuntu.com/security/notices/USN-5036-1
www.cve.org/CVERecord?id=CVE-2021-34549
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
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
62.2%