CVE-2021-34550

2021-06-2912:15:08

Debian Security Bug Tracker

security-tracker.debian.org

tor

onion service

descriptor

parsing

memory access

client crash

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

EPSS

0.003

Percentile

69.8%

JSON

An issue was discovered in Tor before 0.4.6.5, aka TROVE-2021-006. The v3 onion service descriptor parsing allows out-of-bounds memory access, and a client crash, via a crafted onion service descriptor

OSVersionArchitecturePackageVersionFilename
Debian12alltor< 0.4.5.9-1tor_0.4.5.9-1_all.deb
Debian11alltor< 0.4.5.9-1tor_0.4.5.9-1_all.deb
Debian999alltor< 0.4.5.9-1tor_0.4.5.9-1_all.deb
Debian13alltor< 0.4.5.9-1tor_0.4.5.9-1_all.deb

OS	Version	Architecture	Package	Version	Filename
Debian	12	all	tor	< 0.4.5.9-1	tor_0.4.5.9-1_all.deb
Debian	11	all	tor	< 0.4.5.9-1	tor_0.4.5.9-1_all.deb
Debian	999	all	tor	< 0.4.5.9-1	tor_0.4.5.9-1_all.deb
Debian	13	all	tor	< 0.4.5.9-1	tor_0.4.5.9-1_all.deb