CVE-2021-34813

2021-06-1618:15:09

Debian Security Bug Tracker

security-tracker.debian.org

matrix libolm

vulnerability

buffer overflow

remote code execution

unix

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.021

Percentile

89.3%

JSON

Matrix libolm before 3.2.3 allows a malicious Matrix homeserver to crash a client (while it is attempting to retrieve an Olm encrypted room key backup from the homeserver) because olm_pk_decrypt has a stack-based buffer overflow. Remote code execution might be possible for some nonstandard build configurations.

OSVersionArchitecturePackageVersionFilename
Debian12allolm< 3.2.3~dfsg-3olm_3.2.3~dfsg-3_all.deb
Debian11allolm<= 3.2.1~dfsg-7olm_3.2.1~dfsg-7_all.deb
Debian999allolm< 3.2.3~dfsg-3olm_3.2.3~dfsg-3_all.deb
Debian13allolm< 3.2.3~dfsg-3olm_3.2.3~dfsg-3_all.deb

OS	Version	Architecture	Package	Version	Filename
Debian	12	all	olm	< 3.2.3~dfsg-3	olm_3.2.3~dfsg-3_all.deb
Debian	11	all	olm	<= 3.2.1~dfsg-7	olm_3.2.1~dfsg-7_all.deb
Debian	999	all	olm	< 3.2.3~dfsg-3	olm_3.2.3~dfsg-3_all.deb
Debian	13	all	olm	< 3.2.3~dfsg-3	olm_3.2.3~dfsg-3_all.deb