CVE-2021-28089

2021-03-1905:15:12

Alpine Linux Development Team

security.alpinelinux.org

tor

directory protocol

cpu exhaustion

vulnerability

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

7.5

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

AI Score

7.4

Confidence

High

EPSS

0.002

Percentile

61.1%

JSON

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.

OSVersionArchitecturePackageVersionFilename
Alpineedge-communitynoarchtor< 0.4.5.7-r0UNKNOWN
Alpine3.10-communitynoarchtor< 0.3.5.14-r0UNKNOWN
Alpine3.11-communitynoarchtor< 0.4.4.9-r0UNKNOWN
Alpine3.12-communitynoarchtor< 0.4.4.9-r0UNKNOWN
Alpine3.13-communitynoarchtor< 0.4.4.8-r0UNKNOWN
Alpine3.14-communitynoarchtor< 0.4.5.7-r0UNKNOWN
Alpine3.15-communitynoarchtor< 0.4.5.7-r0UNKNOWN
Alpine3.16-communitynoarchtor< 0.4.5.7-r0UNKNOWN
Alpine3.17-communitynoarchtor< 0.4.5.7-r0UNKNOWN
Alpine3.18-communitynoarchtor< 0.4.5.7-r0UNKNOWN

OS	Version	Architecture	Package	Version	Filename
Alpine	edge-community	noarch	tor	< 0.4.5.7-r0	UNKNOWN
Alpine	3.10-community	noarch	tor	< 0.3.5.14-r0	UNKNOWN
Alpine	3.11-community	noarch	tor	< 0.4.4.9-r0	UNKNOWN
Alpine	3.12-community	noarch	tor	< 0.4.4.9-r0	UNKNOWN
Alpine	3.13-community	noarch	tor	< 0.4.4.8-r0	UNKNOWN
Alpine	3.14-community	noarch	tor	< 0.4.5.7-r0	UNKNOWN
Alpine	3.15-community	noarch	tor	< 0.4.5.7-r0	UNKNOWN
Alpine	3.16-community	noarch	tor	< 0.4.5.7-r0	UNKNOWN
Alpine	3.17-community	noarch	tor	< 0.4.5.7-r0	UNKNOWN
Alpine	3.18-community	noarch	tor	< 0.4.5.7-r0	UNKNOWN