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CVE-2021-28089

Good to know:

Date: March 18, 2021

Tor before 0.4.5.7 allows a remote participant in the Tor directory protocol to exhaust CPU resources on a target, aka TROVE-2021-001.

Language: C

Severity Score

7.5

Related Resources (10)

Url: https://gitlab.torproject.org/tpo/core/tor/-/issues/40304

Url: https://people.canonical.com/~ubuntu-security/cve/CVE-2021-28089

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HPDXB2GZHG3VNOTWSXQ3QZVHNV76WCU5/

Url: https://blog.torproject.org/node/2009

Url: https://nvd.nist.gov/vuln/detail/CVE-2021-28089

Url: https://security.gentoo.org/glsa/202107-25

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HPDXB2GZHG3VNOTWSXQ3QZVHNV76WCU5/

Url: https://security.alpinelinux.org/vuln/CVE-2021-28089

Url: https://security-tracker.debian.org/tracker/CVE-2021-28089

Url: https://www.mend.io/vulnerability-database/CVE-2021-28089

Severity Score

7.5

Weakness Type (CWE)

Uncontrolled Resource Consumption ('Resource Exhaustion')

CWE-400

Top Fix

Upgrade Version

Upgrade to version tor-0.3.5.14

CVSS v3.1

Base Score:	7.5
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:	5.0
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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